I keep hearing interviewers saying it, and my sister said it to me today, 'Sure, yeah, sure'.
I think there is something a little rude in it, as if the other person is saying over you, 'yeah, yeah, yeah, I know, I get it, year, sure, yeah yeah shut up.'
It's inherently not quite polite. I think it's very common in the US, but it doesn't sound right here. It sounds a bit ' I already know what you are saying so move on.'
Rude, I want it to stop it's an alien conversational form.