I ran the Diablos last half of last year on my 99 Daytona. I like the profile and the wear. The front is not quite as communicative as the 012ss' or the BT56ss' I ran on that bike previously but only veeeery slightly off. Grip is good for a street tire and I did one wet trackday on them without incident.
I'm doing a bit of a hybrid on my track only ZX6R. A standard Diablo rear (no 160 or 170 size in Pirelli track tires unless I go full DOT race tire), and a Diablo Corsa front which, for my level should be fine. I'll let you know how that works in Mid April[8D].
Cheers, Lee S.