I'm not sure about the Florida guys, but I think I'm the only one who has tried R888s on an IT7 in the northern half of SEDiv. I've only run them a couple times, so I can't comment on wear and maintaining speed over the long term yet. My main observations so far are that they are, over the first 4 cycles, about the same speed as fairly-well used RA1s (approx 20 cycles), but faster than new RA1s. (I have seen a weird pattern where my new RA1s are always slower than ones with 10 or even 20 cycles. After 3 or 4 cycles they are about even with the older ones. This showed up even with RA1s shaved to 2/32s.) So, overall, I'm reasonably sure the 888s are at least as fast as the RA1s, at least to start off.
And the 888s do seem to like a bit less camber. With the same camber as I've settled on for the RA1s, the 888s give a noticeably larger inside to outside temperature difference - 20-25 degrees for the 888s vs about 10 for the RA1s. I haven't optimized the camber for the 888s yet, but I'm sure they will like less than the RA1s. But then I run a ridiculous amount of camber on the RA1s to begin with.
Tom Lyttle
Decatur, GA
IT7 Mazda - 2006, 2008 SARRC Champion
ITS Nissan 200SX - finally running correctly
FP Ford Capri - waiting for a comp adjustment
GT3 Dodge Daytona - what was I thinking?
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