As long as they are up to temperature there actually pretty good in wet/damp conditions, not in the same league as 2CT`s in the wet but then the 2CT`s cant come close to the grip of the Corsa 111 in the dry!!!
If youve never done a wet trackday before it will suprise you how much grip there actually is, you just have to learn to be progressive with all your controls!
Stew.