I'm 25 and don't consider myself to be part of the youth, even though my age is. Who knows whether the new youth will still like the government to be part of their lives.
As I say, the current 14-18 year olds will only know a Democratically controlled government, at least that they know a lot about. They'll remember the Democratic bailouts, the stimulus, any failure on healthcare or cap-and-trade will hurt Obama significantly with them. Not to mention Pelosi, Waxman, Dodd, Blagojavich (Spelling?), Spitzer, and others yet to come I'm sure.
I agree, the only reason why Obama did very well with the youth vote is because Bush was so unpopular and most 18-25 years olds only can remember the Bush years.