YES! One of my pet peeves. The worst, doing a phone screen/interview with someone who sniffs constantly while you're trying to problem solve.
There is a strong correlation between self awareness and intelligence, (I'd google for the white papers for those who will no doubt disagree).
Anyone who chronically sniffs is not very smart and not someone I want to work closely with or at all. How about that as a key indicator, lacks self awareness or consideration of others.