Not my experience whatsoever. Philadelphia public school growing up, we had young white kids who would have unambiguously fallen into categories of "Punk" "metalhead" "goth" "hood" to just name a few of the most cliched highschool-sitcom-but-actually groups. (there was even regular assertions that "hipster" and "scene" were different but that one never really grokked for me)
Especially having lived east vs. west coast over the last decade, the assertion that there isn't a distinct subculture in a non-derogatory way that can be defined usefully as "hipster" doesn't ring true for me.
And for the most part, even growing up, I never got the sense the grouping was malicious except in rare cases. Most kids would own their tastes (usually associated with music and dress) and would probably take insult if you confused their clique :P (And less in the "you just shit on me" way, but that could happen, more in the "how the hell could you confuse that" fashion, which implies to me that others saw the same clean voluntary-group-agglomeration that I saw.)