Though it's hard for many of us to disagree with it when:
1) we heard of quora due to TechCrunch
2) we keep hearing of quora due to TechCrunch
1) we heard of quora due to TechCrunch
2) we keep hearing of quora due to TechCrunch
personally if it's not linked from a story I've read here, I don't tend to read TechCrunch. Nothing against the site, but I find that if it's something that would interest me, it'll find it's way to HN.