I suspect that the century long concern that children aren’t getting enough sleep is at least partially bogus. There are many problems with the scientific studies backing the supposed recommendation up, not the least of which is the assumption that all children need a similar amount of sleep. But why would we assume this when it’s so obviously not true for adults? There are may adults who function fine on a few hours of sleep, others are zombies with less than ten. And there is some evidence that sleeping a lot is correlated with a shorter life span.
I personally love a good night’s sleep, but I’m averaging about 5-7 hours. A good night is 7-8 hours. And while I wake up groggy and confused, I find that I really can’t go much beyond that. Is is shortening my life? I don’t know. No one knows. What matters more to me is quality of sleep, rather than quantity. A hard four hours is better than a broken eight.
I do think there may be a genetic component to it. Although Sue needs 8-9 hours, Abby only needs about 9, about 1-2 less than recommended for her age group. And like me, if we try to force her to get more, she just lies in bed wide awake.