pg, say it ain't so! Are people like me who went to state school, never had a real job and are building tools for businesses doomed?
http://paulgraham.com/colleges.html
Edit: I just took a look at a random sample of startups in the batch we just accepted. Out of 21 founders, 2 went to Stanford, and 2 went to Ivy League colleges.
It's certainly possibly to be successful no matter what school you went to.
If one of YC's methods is to keep up a certain level of excitement, and that's tough to do if you're building something highly functional but with little coolness value. Arguably, this correlates with degree of success[1]. Today it's social apps, tomorrow, it's Web 4.0.
It also seems apropos, considering that YC is, itself, a social program. I've only been to one of their semi-public events, as well as a couple loosely affiliated ones, and they were all clearly biased toward extroversion.
Similarly, I'd suggest "doomed" is hyperbole, as well, unless you mean getting accepted into their program. As a someone heavily introverted[2], it might be a form of torture, resulting in its own doom.
[1] Assuming success instead of failure. I agree there's something to be said for the potential scale of social apps compared to business tools, We haven't yet seen the likes of Facebook, and Zynga operate as public companies, without venture money pumping into the ecosystem. This tends not to be an issue, except with tools for startups.
[2] Though not at all shy.