"I did make a bunch of money by winning the Netscape Startup Lottery, it's true. So did most of the early engineers. But the people who made 100x as much as the engineers did? I can tell you for a fact that none of them slept under their desk. If you look at a list of financially successful people from the software industry, I'll bet you get a very different view of what kind of sleep habits and office hours are successful than the one presented here."
http://www.jwz.org/blog/2011/11/watch-a-vc-use-my-name-to-se...
"I did make a bunch of money by winning the Netscape Startup Lottery, it's true. So did most of the early engineers. But the people who made 100x as much as the engineers did? I can tell you for a fact that none of them slept under their desk. If you look at a list of financially successful people from the software industry, I'll bet you get a very different view of what kind of sleep habits and office hours are successful than the one presented here."
The whole text is worth reading.