He wasn't agile enough to do the disco moves of the PT but I bet he was agile enough to lift Mace up in the air and shake him like a ragdoll or shoot electricity out of his fingers, like he did in the ROTJ (something Dooku should never have been allowed to do).

Or better still nimble enough to avoid every blade swipe just by clouding Mace's mind only to collapse on the floor and play dead in time for Anakin to run into the room and see Mace Allwaysonmycase pointing a sword at his mentor's fragile old body, convincing him that the Jedi really were nuts all along.

But I guess that wouldn't look disco enough.