I grew up in England where you are "branded on the tongue" in terms of your class identity and for this reason, the theory of the acquisition of "cultural competence" has always really resonated with me as well.
That really is quite amazing isnt it?
I had a high end design and renovation business. And hired a friend who had immigrated from Scotland. He's a biologist and a typical working class kid of the boomer generation. Not political, but socialist "of course". And what amazed him was that these upper class people would get someone who they knew had no credentials, and looked and acted no different than his employees, to do the sacred act of designing the Improvement of their Home... with all the cultural identifying importance that has on both sides of the Atlantic.
You can go two ways with that. You can see it as "we're different here". Or you can acknowledge and be glad for the benefits; but at the same time learn from places where class and 'cultural competence' are blatant enough to get you thinking about similar dynamics in your own culture.