While it's unclear if all short sleepers are high achievers, they do have more time in the day to do things, and keep finding more interesting things to do than sleep, often doing several things at once. […]
A few studies have suggested that some short sleepers may have hypomania, a mild form of mania with racing thoughts and few inhibitions. "These people talk fast. They never stop […]"
"There is some sort of psychological and physiological energy to them that we don't understand."
Ahem. (Via Dave Kellam.)