That bit about being singled about for talking differently, and for having different interests from those that predominated in the new school doesn't really sound so much like stereotyping, but more like the kind of thing that happens when a kid transfers from one school to another which is very different.

But in the USA it gets seen as a primarily a matter of colour. In England it would be more likely to be seen primarily as a matter of class. Both explanations would be part of the truth - but the same processes go on even when class and colour aren't involved, for example in a transfer from a rural to an urban school, or a day school to a boardsing school, or mixed sex to single sex.