It turns out most people live inside the house and don't go outside as much as they used to (which is probably a function of the houses getting bigger so its a chicken and egg problem) but what does a big lot get you? More upkeep and property tax. Granted in Texas its usually too fucking hot to go outside but I hardly ever mess around outside my house here. If we go outside its to a park, a biking trail, soccer field, etc... all of which are really close to us. Big lots don't mean shit.
Here's a street right near my house (not my street, fucking stalkers, but I live within 6 streets of here, come say hi)
https://www.google.com/maps?ll=32.83...g=opt&t=m&z=12
The houses back right up to the alley, the backyards are non-existant.