Nah, teens usually don't sleep well at night because of the messed up hormones, that means some of them are like vamps, but certainly not all.
I was sleeping like a rock when I was teen, but as I became an adult my genetic chart caused me to sleep very little or even sometimes nothing ( trust me I sleep when I am dog tired like anyone else...), still I am not out of my mind to ride on social networks like some people.
And those are not teens, those are adults.
I post like 1 status on Facebook in a week, while one person I know posts over 150 during the night hours.
I don't get it.
Of course, the next day that person is rock bottom useless.