I dont think he is that bad.  He was a little chatty, but i think that is just him trying too hard to fit in.  He over did it a bit by not trying to seem like a dumbass, by acting like a dumbass.  He was eager to show us that he knows some of the instance, and how far his knowledge is.  Unfortunitly he showed us that it is not complete.   I think he will realize that we are not a bunch of 12 year olds, adn that we have been to a few places before, and he may realize he can actually learn a little from every one.  I know I learn new stuff about the game all the time.  I say to give him a fair chance and let him settle down a little and all will be good.