FYI, I'm very engaged with Quora, and I live in Chile http://www.quora.com/Carlos-Leiva-Burotto and through Quora I made networking with a guy who works on Mauritian Island.. that's in the front of Madagascar!!!! Not even through Twitter, Facebook, Digg, Flickr, etc I engaged with someone from that place!!

So Quora is definitely a worldwide tool and the active members are not only people from SV.

You should definitely open your mind to not see only the things that you want to see.