I paid for a transponder so I got timed... 1:16.5 (and change) was my best lap. The car had another second, maybe two or three, but the driver wasn't willing to push 10/10ths through the oval. Most of my laps I was around .65g in the oval.
Apples to apples for the day's conditions, by the fourth session I did get faster than an M3 convertible, although he was able to slightly pull away from me on the straight (not stock?).
As far as insurance goes, I don't think it's dangerous as I doubt State Farm would offer any kind of coverage for damage done on a racetrack. It's driver beware. I've done lots of road racing, just nothing in the last 10 years. There were no scary moments. All the drivers in my group were fairly well behaved. Still, a mechanical failure on the oval = a big ball of STi with payments.
I'll probably do a HPDE at PIR again, but for the risk factor Firebird is a better choice.