What is seems like to me is that they had a meeting before E3, the bethesda team, and went over the brief summary of the new features were going to touch on, ad he's just trying to spit out as many things as he can that he's been told to say. On top of his slight speech impediment - I do feel a little bit sorry for him.
He doesn't have a speech impediment, he's just chewing gum.
And there is nothing wrong with Craig's responses, the problem is that the journalist clearly hadn't prepared for this interview.