I think the current mindset in the NFL is absolutely ruining young QBs. There is a big problem coming down the pipe when Manning/Brady/Brees/Rivers/ and a few others all retire in the next 3-4 years. Theres going to be 2 elite QBs in the league, Rogers and Andrew Luck(and even Rogers doesn't have a ton of years left, he'ss be 31 here in a couple weeks)
Young QB after young QB gets drafted by shit teams(the teams at the top of the draft are crap, in order to be in that draft position in the first place), and then are thrown into the fire immediately in year 1. They don't get the chance to learn from a veteran QB how to study NFL defenses, they don't get a chance to learn from a stable coaching staff(most head coaches that have a top 5-ish draft pick usually don't get to stick around long). Its absolutely ruining these young QBs as they come out of college. They play the most difficult single position in probably all of team sports, and are expected to do it at an elite level from day 1, and almost none of them can.
Back in the day, only the truly elite, once-in-a-generation type QBs started as rookies. Your Elways, your Marinos. It didn't happen much. Joe Montana sat the bench as a rookie, Tom Brady sat his entire rookie season. Peyton Manning played as a rookie(and sucked, 26TD 28INT), Luck played and did well, but it's rare. Once every 10-15 years one guy might pull it off. There definitely shouldn't be 4-5 rookie QBs starting in the NFL every year. There shouldn't be 4 or 5 in a decade starting as a rookie.
All of these thoughts go through my head watching Mark Sanchez tonight. The guy obviously has some talent, but the Jets were never going to get it out of him because they were a horrible offensive team that didn't have a system in place where he had any hope of succeeding. Sanchez needed a good, veteran QB to sit behind for 3 or 4 years. The other QBs on the Jets roster when Sanchez was a rookie was 26 year old Kellen Clemons, and then a guy who was a WRs/emergency QB (Brad Smith).
Shitty teams aren't the best place to learn how to play the hardest position in sports as a rookie, and I think it's ruined a large portion of a whole generation of QBs.