America's New Secular Puritanism?

What is up with the kids these days? They don't drink, smoke, do drugs. They don't have sex. They are learning to drive later than ever.

Think this trend will continue? And why are we seeing this occurring?

Have the internet and mobile phones

Are the internet and mobile phones keeping America's youth on the straight and narrow?

Or does it extend their childhood, slowing their maturity? Keeping them from being adults?