Pretty good considering I picked it up on Friday (I did manage to get the recommended break-in miles in before taking it to the track).

I got a handful of 14.30's at 101, which for street tires at Fontana is almost identical to what a stock S2 SRT-4 does on street tires under similar conditions. The sixty foot times were still around mid 2.3's so the car has quite a bit more in it. Maybe when the temps aren't in the mid-90's, it isn't as sticky and humid, and with a little better prep I'll shave some more time off.
It also has a nice top end. The trap speeds were similar at the eighth-mile mark to the other couple modified SS Supercharged cars that were there, but was picking up about 6-8 mph on them at the top end of the track. Compared to the MS3 that I raced once (which I'll assume was stock), the Cobalt was about three-tenths and 3 mph faster. On launch it breaks traction pretty easy, even on the 225's Conti's, but I'll be limited on what tire/wheel size I'll be able to put on over the brakes. Guess I'll have to leave the slicks for the Neon.