I for one plan to open a startup in NYC.<p>Why?  B/c there are no girls in silicon valley.  If you are in your 20s, or early 30s, you are probably wasting your best dating years away.<p>I like to work hard/play hard and NYC seems the perfect place to do it.  In SV, you work hard/get more bored. You are surrounded by boring suburbs.  SF is fun for a while, but good luck finding dateable girls.  (If you are into hipster chicks, it is perfect).
Eventually work hard without corresponding fun becomes tedious, and people burn off, and move on.<p>NYC seems to have a better balance.  When people leave NYC, (or Manhattan), they seem to settle for the cheaper boroughs, or New Jersey / RI.  
When people leave SF/SV, they just move away.<p>Fred Wilson should start emphasizing this more in his posts. He doesn't realize how bad the 'dating' situation is here, and just be in a city where you meet lots of well educated girls, is a huge perk for many single 20s-30something engineers.<p>Ps. I have been talking with some friends also, that are in the same boat.   
Our plan is to actually have at least an office there. 
Seriously.  I guess it is just like rock bands, where people join them "to get the chicks", so will be my next startup. "To get the chicks".   Life is too short.  :D