Duuuude, NO! Or at least, that's what I want to scream at you after reading this. But it is hard for me to refute your logic around investors. Of course, SV has a larger and older network. Can't deny that. But, of course, in SV there are also waaaay more entrepreneurs vying for VC dolla bills. Having spent time in both locations, I wouldn't say it's any easier to raise funds in SV, although they do have more smart money for sure.
But now with FRC, Flybridge, and Founder's Collective (among many others) stepping up in NYC, I think we're just seeing the beginning of an awesome growth curve.
Plus, haven't you been reading Dave McClure's blog? It's not about the tech, it's about the design and marketing. Which NYC has in SPADES.
Alright dude, enjoy SV!