Ceramic bearings are not always run dry! It is hard to find any good testing on the subject.
I e-mailed the guy that put ceramic bearings in the Wheels, Headset, Crank, Connecting rods and Tranmission in his MV agusta but he did not perform before and after results and seemed pissed off that I would even ask such a question.
He did however respond that the seat of his pants feel was night vs day...go figure?