Do we know those cruisers aren't just Jedi star-fighters? 🙄
Given that 'cruiser' is pretty much a vague designation for a star-ship of varying sizes. And of course, as DMB pointed out, the same author had used the term to label speeders. Now, during the events of the Final Showdown, they're weren't dropping off an army of troops. The Jedi's ships would have only needed capacity for about, lets say around 10 people. So i doubt this is Dooku's defining feat.