America is a diverse place and it is hard to generalize about its ruling class in the same way as France or England. Still, the last few decades have seen a considerable homogenization of the American rich, due to inbreeding, the decline of once-prominent regional/religious differences, and the rise of a globalized economy. With a few exceptions (e.g. The Hollywood Glitterati) the American Rich are a pretty boring bunch; whether computer nerds, heiresses or corporate executives, billionaires or millionaires, they all tend towards a bland mediocrity of dark suits or polo shirts, charitable functions, supersized McMansions, super-model trophy wives, and a strange obsession with yachting.
Not the worst of snobs, but far from the best.