1. I'm no child psychologist, but kids tv shows have tons of social queues.
Not just about getting them, it's about the need to process information over social cues. See the difference? If most children's shows have a limited amount of social interaction they can teach (And they do.), but a large amount of information--then more exposure to such shows will increase the need for information processing, even if the shows all have social interaction. Remember, before this last generation, once Sesame Street was done, a child either watched normal TV, or hung around mom and learned. Now a child can literally sit and watch information based learning programming ALL day--and they often times do.
Think about your normal TV--it's a lot heavier in terms of social interaction, because...hey, that's drama. And if they hung around mom/dad/bro/sister (Whatever) I doubt those people are going to be teaching them what a square looks like or how to cross the water by finding a bridge on Dora's journey, right? But children's TV is a constant stream of this and it's on 24/7 in many homes.
2. There's a massive # of diagnosis of autism before kids start using computers that frequently.
Two things, direct use doesn't have to be an indicator. Technology is everywhere and information is more accessible than ever. Children are exposed from the time they can spend time with mom and dad, while mom and dad try to do other things.
Secondly, it's not all about environment. Information has become more and more widely available every generation since the printing press was invented. These last three generations have seen exponential growth in the availability and totality of information stored. And I'm not saying there is "more" information today (Though there is)--I'm talking about stored information in forms with the ability to disseminated easily to other people. For an example of this, look at the amount of pictures that exist now, compared to when the first instant camera was invented. We can literally communicate with images now, they are so easy to manipulate.
Heck look at this board for example. Attaching images to convey meaning is practically a method of communication on it's own. Do you think that happened a generation ago? Think people had conversations and then attached pictures that referenced their talking points in funny/odd/interesting ways? I don't think people realize just how massive the change in communication has been, and it didn't start with this generation--it started with the one before us, actually--it continued with us, and now we have children.
Heck to continue with this--think of Youtube. You know what you did if you talked with your friends about a movie scene that was awesome just 15 years ago? Yeah, you just talked. Because unless you went to the movie store (Remember those?), got the VHS, and fast forwarded to the part, you couldn't show them. Now it's like 10 seconds, and you can show them nearly anything, I mean I get really annoyed when I can't find even a mundane/small/arcane clip of something on youtube, I just expect it to be there. And think of the massive social difference it takes in explaining and acting out a scene for them (If you were really dramatic) vs typing into youtube and conveying the information directly. Me and my friends actually did the whole VHS thing with demon knight because we thought the dance scene was funny....It took us an hour to get the video, find the scene. Lets see how long it takes me to show you the scene....10 seconds, it even auto completed the search for me. Information--it's become more accessible and you can be exposed to a great deal more of it now at much younger ages.
3. If there's such a dramatic correlation between using electronics that don't show social situations and autism I'd imagine it'd be exposed by characteristics of children rather than the total # of autistic kids.
Again, no need to drop the social cues. It's just amount of information vs social cue learning--the amount of information has *dramatically* increased. And how would we know if it's a characteristic in children? Expression of less social behavior is just now being studied, and some people hypothisize that it's lead to numerous things, like the precipitous drop in teenagers getting their licenses, for example (Which back in my day...12 years ago...my license was absolutely needed for social life.). And I know it's anecdotal but my kids take to the computer, gaming and online much easier than I did. I remember fumbling around in AOL chat rooms, asking how to make the big ASCI pictures, thinking I was neat that I found a macro program. My son can write web pages at 12, and when someone asks him how he is doing, he sends them a picture to show it, rather than talking to them. The difference in how things work is staggering.
I think we're often times blind to the changes because they've happened so gradually for us. I don't even remember a time when talking on a message board was impossible. It seems ancient when there was a time I couldn't flip on my phone and video chat with my wife, or send a picture of anything I wanted--or had a freaking camera I carried around ALL the time...But all of these things are advents of the last 15 years, they ARE new and they are radical. There used to be a saying "If only I had a camera"--you know, because not everyone carried their own micro computer with a camera in their pocket.
And like I said, this was just a preliminary study that found autistic children have an easier time communicating with pure information, and that there is a statistical relevance in the number of them that come from information heavy parents who use a lot of technology. The rest is just a hypothesis about brain changes...I don't know, it makes a lot of sense to me but maybe that's because I watch Mad Men and marvel that even if I traveled back 50 years with my smart phone, I'd have almost alien powers if I could still connect to the modern internet.
(And anecdotal, people in previous generations who absorbed a lot of information, like people on the genius level, had a far higher incidence rate of being social awkward, as far as I know--right? How hard is it to believe that the absorption of mass information, even though it might not be relevant like relatively, heck it might only be thousands of lolcats and movie quotes, is doing the same to all of us because there is just so much of it--how many times have you caught yourself getting lost in youtube, TVtrops, Wikipedia (Or wookiepedia) just absorbing information? It happens so often now, we might not be Einstein gobbling up information about the universe but we are gobbling up information more voraciously than our parents, even if it's junk food.)