If this guy is starved for talent couldn't he just increase what he's willing to pay and steal people from other tech companies? (There are a number of people who would be willing to jump ship for the right #s I'm sure.) This seems to be where BusinessWeek is correct. At the end of the day engineers should be getting paid more.
Why don't these guys list their bios on the website in a prominent location? I find it difficult to trust any exchange that doesn't do this personally.
Having raised cap and interacted with a bunch of YC alums (hired 2 and friends with others), I can strongly second Elad's points. Just because they're in YC and exposed to some very accomplished people doesn't imply that they already know these things. They have a lot to think about when they're starting up their companies, so it's hard for them to absorb everything at once, despite being super smart.