Oh, oh, oh. It is just shocking how much mileage I'm getting out of this (twice this was relevant on SF)!
Before I started this specific research, I was focused on national cultures (Hofstede, GLOBE, WVS, etc). And until recently, I would have agreed. But actually, research into subnational culture (current, but not long term, interest) consistently shows (at least in Europe, Canada, and the US) that differences between subnational (regional) cultures are equally large and sometimes larger.
My point is centered an attitude that is endemic to a specific gender of a specific ethnicity of a specific class. Not America as a whole.