Having moved from Perth to Silicon Valley I've got to second this. In Australia I'd get approached about jobs maybe every couple of months while in Silicon Valley I get approached every couple of days.

While I primarily do security rather that software, in Australia the approach would be "Are you interested in contract work for Reputable Government Agency / Mining Company / Bank?" while in Silicon Valley is "Hot new VC funded startup looking for a rockstar to secure the social local cloud!".

I'm really enjoying the difference.