The impression I get is that there's huge peer pressure to be awake until late. My DD seemed to genuinely think she was missing out on life if she went to sleep at a sensible time. The late evening seems to be the time for posting on facebook, instagram etc.
I think she could have slept at 8pm many days but that would have been 'boring' so she'd soldier on until she got her second wind at 10pm and pinged into life for another couple of hours. There was no telling her.
She's been a bit more sensible since she turned 17. In her case the poor sleep pattern was a result of a combination of being rebellious, typical teenage sleep hormones not 'kicking in' until later in the day, naturally being a night-owl like her DF, being hooked on social networks and often lack of exercise.
Not managing to enforce a better sleep routine has been one of my parenting failings. It's very frustrating. Even telling her that lack of sleep often results in increased calorific intake (with the obvious consequences) and bad skin; both important to her, had no effect.
On the other hand, like many of her friends with a similar sleep pattern, she did well at school and got a place on a very competitive higher education course. And she eats reasonably healthily, doesn't smoke, didn't drink until she was 17 and then (so far) only moderately and is generally fairly happy. So I don't know.....
That's my experience with an older teenager FWIW. (My !14YO is much more sensible, but he gets much more exercise and isn't into social networking sites.)