I agree with the Wikipedia comparison. I'm seeing many of those Google searches that have Wikipedia pages as the first result now with Quora gaining ground fast

I agree with the Wikipedia comparison. I'm seeing many of those Google searches that have Wikipedia pages as the first result now with Quora gaining ground fast. There are two things that Quora is doing that aren't novel, but they are doing them really, really well: 1. Building an amazing topic taxonomy. A big hierarchy of topics that interest people. 2. PeopleRank. Who is an expert on which topic? Have they linked their Twitter/Facebook? Quora have some amazing data.