[Iterated]

Weird. I follow my friend's high school aged little brother on twitter and it seems there are a lot of high schoolers on twitter. In fact, this guy deactivated his Facebook and only uses his twitter and Instagram now. He lives in Texas though, maybe Texans are behind the curve.

From what I've noticed it seems that Facebook is definitely far less cool than twitter these days.

[argonaut]

I may have been a little harsh on Twitter :). I do think quite a few high school / college students use Twitter. But here's a handy metric: look at the # of people someone is following, and then look at the # of friends they have. The difference is usually 7-8x. I'd wager there is a similar differential in activity.

[Diamons]

I can attest that nobody I know has a twitter.