How valuable is location if you're not in SV? New York seems pretty great for media companies. But what about else where? What is Londons calling (zing)? Is th

How valuable is location if you're not in SV? New York seems pretty great for media companies. But what about else where? What is Londons calling (zing)? Is there notable value in groups of startups being together other than the PG "don't ever stop typing" social aspects? Whilst that is valueable, a lot of startups go to SV for the visibility and proximity to the exit acquirers.