Use these on a Classic shape Subaru Impreza STI (280bhp) and have done one track evening at Snetterton and 3 / 4 track evenings and one day at Brands, which probably equates to about 1500 miles (including on road use there and back too) and they are near to half worn but in great shape still.
To be honest when I had an instructor in the car could not believe how fast I could go round the corners at Snetterton, the grip is tons better than other road tires i've used on track (obviously) and they resist fade for about 15 laps of Brands Indy before needing a cool down too, but then 20 minutes later there as good as new.
As for wet grip, my last track-day evening was the wettest day of the year and at one point I aquaplaned on my right side tires, on the way to Brands, at 60 mph, and I had enough control to pull the car the way I wanted. So I would say as good as normal road tires in wet and better in the dry. Highly recommend.
I should point out this is a weekend only / track day car, so less than 3000 miles a year and I have another set of road wheels with Eagle F1's, which I can drift on, these its harder too.
If you can afford go for R888, but you can get through two sets of these for one set of them and only lose out on 5% grip level / fade resistance.