The only reason Im not worried is that dungeons are long, there is no way to rush through with a normal group. The friendships are built with the teamwork/talking it takes to get to the end, not so much on how you got there.
Now if people start making groups where no one speaks and the bully you to hurry to the end. IM GOING TO HAVE A CONNIPTION FIT.
I dont think that will happen though, Classic is going to be great.