I thought it was very impressive. He controlled Mir like it was nothing and had some great clinch work. I'll concede that he probably could've finished Mir when he had him wobbly instead of going going to the clinch so often but other than that, Cormier looked like a monster.
And to the people saying he was stalling against the cage, what fight were you watching? Cormier was working his ass off.. especially for a heavyweight.