Just returned from Richard Petty Driving Experience now with video
Sounds really cool.
I would think the top race team cars drive a little better. Balancing and wheel alignment plays a large role, even the driveshaft needs to be right on. If those test cars were in a race, they would not be out in front of the pack.
Don't forget, most drivers are under 40, maybe 30. I used to ride dirt bikes as a teen, if I rode one now I be sore head to toe later on.