Quite apart from the political incorrectness, in fact the downright hazardousness, of labelling particular people as stupid or gifted, given the difficulty of so much as defining stupidity, I am not aware of any clear correlation between sleep requirements and "intelligence". Napoleon said something like "Six hours' sleep for a man, seven hours for a woman, and eight hours for a fool." What that proves, I leave to you to decide.
I have known highly impressive people who needed literally only a couple of hours' sleep a night, and others who sleep all night and a lot of the day, but then I have associated more often with bright bulbs than dim, so I cannot offer you an unbiased sample population. I suspect that if persons of slower intellect do tend to sleep more, it is because life is more wearisome for anyone who must support a brain without anything to lighten the boring burden, but I could not defend that view against anything like a substantial challenge. For one thing, not everyone who survives an all-night booze-bedlam-and-drivel party on his feet, is necessarily rich.
Nighty night,
Jon
