NYC specifically has a large number of attractive women for the same reason LA does: a lot of industries based in the city which employ and are built on attractive women. There are people working service jobs (waitress, bartender, etc.) who really want to break into those industries, too.

In LA, it's movies and music. In NYC, it's music, modeling, fashion.

That said, I'd prefer a "6" who is super-intelligent and interesting, to a "9" with whom I have nothing in common.