Yes, it's a class thing more than a race thing at this point. I probably should have tried to make that more clear. :/ It was a race thing historically, but now the racial line is incidental to the class line.

I do think African-American culture is a unique case, though. Immigrants tend to be socially (upwardly) mobile and get out of the ghetto in a generation or three. The old black neighborhoods are different, much more trap-like and harder to escape.