Huh, I'll be damned. I found some stats (from 2011) that were roughly 20% SF & NY (bucketed together), 30% the rest of the U.S., 30% Europe, and 20% elsewhere.

Huh, I'll be damned. I found some stats (from 2011) that were roughly 20% SF & NY (bucketed together), 30% the rest of the U.S., 30% Europe, and 20% elsewhere. I'm surprised. 20% for two cities, and 50% for one country are still a pretty heavy focus, but definitely not to the degree I'd previously thought.