At what point did the acceptably polite response to “thank you” change from “you’re welcome” to “yup?” Is that something recent? Did I miss the memo? Or is it a New England thing, maybe? I know it was never an issue for me until the last couple of years, but now it grates on my nerves something fierce.
I was raised in the South, and (warning! stereotype alert!) Southerners tend to pay perhaps an undue amount of attention to little politenesses and social niceties–even to people they don’t like. I had the Holy Trinity of Polite Social Interactions–please, thank you and you’re welcome–drilled into me from the time I could talk.  I hear the first two all the time, but rarely do I hear the third anymore. I get the “yup” constantly nowadays, even from people that are otherwise unfailingly polite (which is what makes me wonder if it’s not a regional peculiarity).
To me, “yup” is dimissive of the thanks I give. I’m sure it’s not intended that way, but that’s how it feels. “You’re welcome” says to me “I acknowledge and appreciate your thanking me for whatever it was I just did for you or to you,” while “yup” says to me only “I acknowledge your thanks.” I know that’s not consciously the message that “yup” sends, but that’s how I take it. And yeah, I acknowledge that the problem is likely entirely in my own head.
Mind you, I’ll still take “yup” over no response whatsoever to my thanks any time.
Can any of you out there who live in/are from other areas of the country/world shed some light on this issue for me? Thank you.