Earlier quoted context omitted.
There is anecdotal information that he does indeed do what he claims. And he is the most impressive CEO in this generation, perhaps in history, so long hours must work for some people.
> ... he is the most impressive CEO in this generation, perhaps in history How anyone can say this with a straight face blows my mind when even in the tech vertical he has some serious competition (are we forgetting about Jeff Bezos, Larry Page, Sergey Brin, Bill Gates, Steve Jobs, etc.), let alone actual historical figures like Henry Ford, John Rockefeller, Cornelius Vanderbilt, etc.
His goals, at least, are ambitious in a way that those of the other people you mentioned aren't (except possibly Bezos, but Bezos doesn't laser focus on this stuff the same way Musk does).