The "coming apart" of American culture isn't because too few people watch NASCAR or eat at Applebee's, it's a problem because in one America lots of people do it and in the other America people never do it. It's slowly creating two separate cultures where people have trouble relating to each other because they're growing up with two distinct sets of cultural experiences. It's only incidental that the divide in culture is being driven by meritocracy picking the haves and have-nots.
I'm not surprised you found the results unimpressive, since Britain has a far different history with class and mobility than the United States. I was impressed with how the questions ascertained that I'd grown up in a rural area then moved to a wealthy suburb in adolescence. Things like going to parades, eating at Applebee's, or going fishing were strongly present in the first half of my life and completely absent in the second half. I crossed a major divide in American culture without even realizing it.
I'm not surprised you found the results unimpressive, since Britain has a far different history with class and mobility than the United States. I was impressed with how the questions ascertained that I'd grown up in a rural area then moved to a wealthy suburb in adolescence. Things like going to parades, eating at Applebee's, or going fishing were strongly present in the first half of my life and completely absent in the second half. I crossed a major divide in American culture without even realizing it.