The obsession with manners and etiquette is more of an upper-middle-class trait than upper class. It's supposedly driven by the desire to differentiate themselves from the "middle class". Quantitatively they've shown this is why you see more use of latinate words in that group (like "Limousine" rather than "car") relative to folks who are truly in the top 1-5% by wealth.
That said, I don't think this factor is an issue for just about anyone who graduated from an Ivy-League or comparable college. In my experience at front-office corporate jobs, someone unable to present themselves reasonably at a client meeting, even at 20 or 21 (we had college interns) would simply never have been hired, but I don't remember it ever actually being a problem.
That said, I don't think this factor is an issue for just about anyone who graduated from an Ivy-League or comparable college. In my experience at front-office corporate jobs, someone unable to present themselves reasonably at a client meeting, even at 20 or 21 (we had college interns) would simply never have been hired, but I don't remember it ever actually being a problem.