Later school start times are associated with more sleep and better performance
As a kid I remember waking up at 7 and heading to class which was starting at 8. I was half awake up until about 10 in the morning, I don't know how I was making it to school in one piece (school was within walking distance and was about 15 minutes from home). Also, in the winter at 7 it was still dark and cold I still remember the a magnetic force I had to fight away from the warm cozy bed. That was me at the time. A group of kids didn't seem to have this problem at all,  so this early sleepiness phenomena is not universal. Throughout my life I was also a night owl, my most productive and creative moments took place after dark. Recently, however, something changed. I feel much more comfortable in the morning, I even enjoy the quiet hours early in the morning until things start to hustle and bustle and enjoy and am able to go to sleep earlier.<p>So to conclude, this is not a universal thing and this is the problem, we are all different so a one sized solution does both good and bad.