I don't know about 99%, but when I asked the driver of a BMW M5 why he blocked me and wouldn't let me pass when I was obviously faster, I was told it was "because I couldn't allow myself to be passed by a Dodge." He even sneered when he said "Dodge." I'd say that's pretty much the definition of snob. In my experience the snob ratio of expensive car owners at the track is closer to 50%.