Thanks for sharing this link rdr.
I've known that many times gifted kids sleep more than average, but I've always heard it was because thinking and focusing burns calories. I've also heard that when learning another language you know you're getting it when you start dreaming in it.
That is fascinating that kids spend 1/4 of the time they sleep processing what they've learned from short term to long term memory, and adults only 1/10th of the night. No wonder when I study something too much I start to dream about it.

Youth lives by personality, age lives by calculation. -- Aristotle on a calendar