2 runs from a very wet autocross. (Both runs are clean and on course) My Z is set up for, and does well in, dry conditions. However it is an absolute dog when conditions are wet. Even short-shifting to third, and staying there, couldn't calm the throttle oversteer. (at just about any rpm) After these two runs, I borrowed a stock-class RX-8 for my 3rd run and a bone stock WRX (with an auto transmission) for my 4th run. I was 11 seconds faster in the RX-8 and 12 seconds faster in the WRX. And today was my first time driving each of these particular examples.
Z+wide Kumho XS tires+ water = no traction. Z's and water don't mix well in general, but the mods I use to go fast in the dry make the Z even worse in the wet. -Still fun though.
[ame="http://www.youtube.com/watch?v=SAFXE60mrng"]YouTube - Play'n in the rain[/ame]
Someone posted a vid from outside the car. Not much going on in this short clip, but you get an idea of how much water was on the track.
And a run on dry pavement for reference. (My most recent event.)