Mourinho's not amazing at all. He's not particularly great on the tactical side, but he does excel at motivating a team and building a strong team spirit. he might even do it at inter.
But they played completely crap football, Milan played better especially at the beginning. granted, Inter could have scored 4, but that's more a reflection of how well long-ball tactics worked against Milan's slow and crappy defence. Ronaldinho played very well, Pato looked good, but Pirlo was crap.