It's true, you wouldn't see a character like, say, Ace coming from a single-parent home in an area implied to be dangerous, racist, and less affluent. :) Point taken, though - it really was only in the last couple of years there that the world became a non-white, non-middle-and-upper-class place. Most race and class issues seemed to be dealt with in SF allegory before that. (Mind you, Rose's council estates seem very affluent, safe, and free of all race tensions, which I think probably does say we're looking at something essentially middle class aspiring for the visual trappings of a class that's not, without the actual downsides of a character who's been raised somewhere that actually features any racism or muggings or being poor. She's never really blurted out anything awkward for middle-class viewers to hear, unlike, say, "white kids firebombed my friend's house".)