Of course the class system is alive and well and the elite still have a value system that they employ to spot one another, but I think the views of martorana as to what things these might be are absurdly outdates and UK-centric (which in itself marks them out as ancient history).
Knowing how to eat asparagus will matter not one jot to your chance of getting a position in a bank, a fund, a large corp, an international law firm, a media outlet, a publishing house, a leading university etc
Nor will knowing the lexicon of a few public schools.
The world is an entirely changed place and such signifiers are seen as sweet but unimportant in the scheme of things.