OMG, Twitter has to have the best fricking marketing people in the universe. Just look at the title. It's like it is expected or assumed that everyone has to be on Twitter and the fact that teenagers are not on it is some troubling problem or some curious aberation. It sounds like "why don't teens exercise."

I don't know, maybe teens don't tweet for the same reason I do not tweet. Maybe they have never actually felt the need to tweet.