Unpredictable is a very good description of Cup 2s in the wet especially when they are not brand new
Ran them on my R at a sprint which was wet as did not have chance to put a set of super sports on, the car for something with 4wd was a joke, on the plus side the GT4 owner was also having issues on them. The issue was getting heat into them at the rear on the Golf which was compounded further by haldex but power to cold tyres at the rear
These tyres do transform car but there is a trade off when damp, they actually coped quite well when cold but dry but when the temp went below freezing i left it parked up.