A P.S. (to counter the acerbity of my comment in reply to tptacek):
It's a really, really big world, filled with really bright people. They can't all be in SV/NYC/Bos/Chi/Aus/whatever…and if they were, the world would be worse off for it. There's important work to be done in every locale, and there's no sense in implying that one is lesser because of where one sleeps.