I don't know, I've seen as many or worse BMW drivers. Like someone mentioned most of the G's I see are sedans and are driven by older men. I don't see that many Coupes around for whatever reason. My parents have his and her G's and they could care less what other people drive and certainly don't think or drive like they have the best cars in the world.
I've also had problems with Volkswagen drivers, Honda drivers, etc. I think its all about what's between the wheel and the seat that makes the difference.