They may not be very familiar to the world at large, but they are certainly familiar to the brothers in butt fucking. That's right, we have our own stereotypes for each other, and they're much more specific than you can ever imagine. That said, when the gays see a fellow homosexual in the public sphere, we try to plug them into the convenient taxonomy the community has made for itself.
A queer will tell you that we are all individuals and that those stereotypes are false and horrible. Just like the world at large may stereotype gays as mincing wrist flippers with great taste bent on giving everyone they meet a make over. It is actually broken down into a handful of substrata to which each gay belongs.
The gay world is often represented as some sort of monolithic whole that has the same culture.