Given that the Painkiller solo and the whole song is still so influential after all these years, I'd say that's some sort of great tone whatever that means.
I am scratching my head to think of someone on a cam kahler that would traditionally be considered "great tone" but I think most of the claptonians would say the same thing about any floyd player as well.
There were some plausible suggestions about how these things could dampen strings or hurt sustain, but I did a few Flotsam and jetsam Albums and if sustain were ANY issue at all from the cam style Kahler, the guitars would have immediately gone in the dumpster. I'm trying to think of anyone who needs notes to last longer while wildly flailing on the tremolo bar...Maybe Wiley Arnett from Sacred Reich, but I think he was playing cam style kahlers at some point as well.
I could see sustain being hurt by not enough pressure on the saddles, but of all things that can change frequency or harmonic content, I don't really see anything plausible on a tremolo...the famous balsa wood chopstick bridge tests pretty much put the nails in the coffin that rigidity of the saddles has any effect on an electric guitar's electrical output harmonics (and really, given how pickups actually work its not ALL that surprising, but still had to be confirmed)
What happenes with those graphtec saddles? Do they kill sustain? I see people swearing by titanium floyds...somehow both mass and lack of mass are claimed to help sustain...and crazily the same people swearing by giant brass blocks say titanium is even better!
This is why claims like these need evidence, not just anecdotes
