There definitely are regional differences in the automotive fleet.
When I moved to N MN there was NOTHING... NOTHING but 4x4s and Cadillacs. The town has three dealerships and they are GM, Ford, and Chrysler. You have to drive over an hour just to go see a foreign car dealership.
Out in Cali I saw so many Priuii and other foreign cars, it was like the opposite of home- you had to squint to find a domestic sedan; they just aren't there! I was surprised, though, to see as many jacked-up 4x4s in Cali as I did. For some reason I thought they were more enlightened out there.