It can't just be me noticing the slight change in the way people conduct themselves in dungeons with the onset of commendations. People say hello, they go out of their way to advise on mechanics, make light hearted jokes, and the most shocking part of all, I've seen several people actually apologize for making a silly mistake.
I believe we all want commendations, and we all know being a d..ck isn't going to get you one. Call it coincidence, or what have you, but I believe people are genuinly being more civil to one another.