I had 1-2 secs free spin, until I removed a few shims now up to 2-3 secs, I suppose if I hooked up the dremel to the back wheel I could get it to spin for at least 5-10 secs...
Break the car in TB, and heh don't judge a car based on free spin.
I've seen people break the plastic and carbon shock towers (rear anyways) usually just after flipping the car and hitting the end boards at the end of the straight. (so hitting the boards with the top of the car)
My car is going great and my driving is progressing nicely, now I just need to find a bit more steering at high speed power on, and a bit less steering at low speed power off...