Maybe that's why I see so many more teens at, say, anime cons, where one doesn't have to be a token anything? (The one anime con I've been to so far, I immediately wanted to make every adult SF fan attend too, or at least every adult SF fan who ever whined that teens don't read SF any more!)

Very interesting thought, about dystopia being a thing apart from either SF or fantasy. I tend to think there's a lot of YA SF out there, but an awful lot of it is the dystopic stuff. (Which I enjoy too, but I'm pondering the idea it's at least somewhat a separate thing now ...)