I've got full-floating discs on both my Ducatis. I got an MOT advisory a couple of years back for the 916 (but not last year?) due to the amount of 'float'. These are Brembo HPK discs that are fully floating by design, the others (on the Monster) are standard Brembo discs converted to fully floating using STM buttons.
Funny how the original floaters float more (too much in the MOT tester's opinion) yet the converted don't, but it maybe due to them having alloy carriers rather than steel? Although I'm not sure if the wear is on the carriers or the buttons?
Anyway, not easy to measure but if you (Jeff) want to measure them/see for yourself, you know where I am.
