That site is half hypotheses made up by the author, and half irrelevant things like "this study proves that you won't die sooner if you cut 2 hours of sleep". Nothing in there indicates that sleeping less won't lead to less physical ability.
I only skimmed for references after the comparison with junk food, hunger, and cavemen. It truly sounds like they are making this up as they go along.
I only skimmed for references after the comparison with junk food, hunger, and cavemen. It truly sounds like they are making this up as they go along.