I'm not going to comment about this comparison between SV and NYC, but I think it's really interesting how PG mentions that bit about Zuck crossing paths with Sean Parker. It reminds me of this clip from Stanford ecorner about how Max Levchin and Peter Theil randomly met one day at Terman - http://ecorner.stanford.edu/authorMaterialInfo.html?mid=1022

I think Paul Buchheit said it best regarding serendipity - http://paulbuchheit.blogspot.com/2010/10/serendipity-finds-y...