When I was younger(13-14)I used to sleep similerly to this schedule.Cant quite remember why I started it but just that it became a habit and that I had to stop it due to a new class schedule.In total I guess I slept for 40m-60 minutes 4-6 times a day.I could understand concepts and generly "get" things much quicker than now but that just specualtion.But I do have to sat: I used to have a weight issue then and (this is completely specualting)have grown more in the past year(I'm currently 17) than before.

Sorry to dig up an anciant topic but thought you might like some more info.