That's where the street stuff shines in my experience... I drove around a ton of slip-sliding IT cars at the ARRC Enduro last year. It started misting and then raining while everyone was on grid. We were on old Star Specs (14 hours at CMP+ the ARRC test day, sprint, and Pro-IT). I think I picked up like 6 or so spots in my stint? And that was after losing 3-4 due to a tentative start (it wasn't my car, it was RA, and raining).