Not saying I agree, BTW - I think that binary startup success has a large skill factor, but the magnitude of that success is largely luck, and that good luck can mask bad practices to a large extent. So in my view, people with relatively minor startup successes like Sam Altman, Paul Buchheit, or Michael Siebel might actually be better coaches than knock-it-out-of-the-park successes like Larry Page, Mark Cuban, or Notch. But don't misrepresent the argument: operational experience running an existing business is very different from experience founding one.