I was there as well, the bush presidency lasted my entire middle and high school career, and I got the chance to vote for Obama in my senior year.
I remember things very differently. Everyone cared about the Iraq war, gay-straight alliance was one of the most up and coming clubs, and political music was everywhere. Green Day had their big second wave with American Idiot, System Of A Down was on top of the world, Rock Against Bush was huge, anarcho-punk like Rise Against was getting big.
I'm not a teenager anymore obviously, so it's entirely possible I'm just missing it, but I've seen very little that compares to those sort of movements. On the other hand, most millennials I know are still wildly politically active.