> Super-sleepers like Joanne Osmond inherited a preternatural ability to thrive on only a few hours of sleep. But this genetic trait is very, very rare, so if you regularly sleep less than 7½ hours a night and suspect you might fall into this category, think again; chances are much higher that you are not only sleep deprived but also so used to living this way you can’t even see the problem.

Interesting, I was under the impression that such people were just sleep deprived, deluded, and likely to far underperform as a result.

Margaret Thatcher was said to sleep just 4 hours a night. The same claim is made for Trump. Would be interesting to know if they're both super-sleepers.