I noticed in matches where theres a heavy favourite, or even just a champion vs challenger, Joe will focus on what the weaker fighter has to do to win. If he starts to do it, Joe will get amped up. It's like we know the other guys is good. However, if the underdog performs like an underdog, Joe will talk about how much better the favoured fighter is and what he's doing that makes him so good.
It sort of happened in the first Rua vs Machida fight, where Machida was the champ who couldnt get hit. Joe focused on the fact that Rua COULD hit him and took the champions performance for granted.