There are, of course, other class indicators, for example at what time of the day one has what kind of meal, what clothes one wears, houses -- where and how, and whether one likes the late Princess Diana or not. The latter, in fact, managed to draw a sharply defined line between the middle classes, who adored Diana because she displayed ad nauseam all the maudlin and phoney values of which the middle classes are so fond, and the upper-classes, who hated her because she was, as "Private Eye" put it in a meanwhile removed article, "a neurotic, irresponsible and manipulative troublemaker who had repeatedly meddled in political matters that did not concern her and personally embarrassed Her Majesty The Queen by her Mediterranean love-romps with the son of a discredited Egyptian businessman".
Fair warning: there is some profanity in this post. Also some rather mild sneers at American speech, but we can take it. Besides which, much as I love my country, I will readily admit that our accents are terrible.