The East coast being 'older' has lots of areas which retains some values and habits and traditions that don't resonate with those who moved 'out West' in seach of more independance, etc....so you get a bit of cultural difference there, but with modern travel and TV and such, those aren't quite as pronounced as they were even 30-40 years ago.
The place is so durn big, it is hard to generalize....except that Southern California IS on a different plane..*grin*