I enjoy the connection with the car, as well. This is the reason why I stated that the North GA mountains can't push the car to my satisfaction. But, that is my fault. If I would take her to the track, I would enjoy her much more.
Please do tell me which cars you have driven that would "KILL" the GT-R on the track? There are very few that are capable of such...and these have to be very highly modified. Again, I said OEM vs. OEM. I promise you can't name a car that would "KILL" the GT-R on the track that is an OEM production car.
As for your friend...I bet the reason he doesn't track his GT-R is two-fold. 1) the cost of doing so is ridiculous as far as maintenance goes. And unless he has a hook-up with a shop that performs aftermarket GT-R work, then he is reliant upon a Nissan dealership...which means, of course, big $$$...or... 2) he doesn't want to damage his GT-R.
btw, what is the name of your friend? I know pretty much all GT-R owners in the Atlanta area and I know plenty around the world from NAGTROC. We are a tight-knit community.