I'm well aware of the research, I'm talking about the scheduling.

And more research will be produced showing that teen clocks are also offset, but it's still the case that I have all my anecdata about what it feels to be tired, to get enough sleep etc., and what it feels like to be a teen rebelling against any rules.

hunter gatherer teens did not sleep late every morning, they had to get up just like everybody else, probably at the crack of dawn