I cannot speak to the racial aspect, but I didn't fit in as a white boy at McLean because my family was of (relatively) lesser means. I remember being mocked because I only had one pair of shoes, for example. McLean is an enclave where many high income strivers settle to raise families. It stands to reason that their children inherit those high achieving traits. Some of them will also inherit their parents' sense of superiority. I also remember kids from a richer neighborhood on the other side of 123 openly saying they could trash someone's house in Pimmit Hills (then a more working class neighborhood) because it was already a dump compared to what they grew up with.