Well, I just got back from a European vacation that included some laps on the Nurburgring! We also went to Italy and France for the standard tourist stuff too. I feel like I just had 4 vacations crammed into one week so I'm wore out, but very happy.
Anyway, I wanted to share my experience on the Nurburgring as someone who had only driven it in sims (primarily PC2) before hopping in a rental GT86 and taking some laps IRL. Not only was this my first time on the Nurburgring, it was my first track day....and PC2+VR turned out to be great practice for the real thing! **with some important caveats**
1) The forces pulling on you while driving at the limit can be surprising, distracting, and even disorienting. Some people get used to it quicker than others, but sims, even motion-rig sims, can't reproduce the full real-life effect. My RL experience with driving-G-forces comes primarily from years and years of autocrossing. Autocrossing is not the only way to get used to RL driving G-forces, but it may be the cheapest....but most of the autocross events I have driven lack serious elevation changes. (Usually by design)
2) Elevation changes add another layer of G-forces to mix and the ring has a lot of them. VR helps bring this home visually, but still can't recreate the full effect of the ground falling out from under you at high speed. My yearly pilgrimage to the Tail of the Dragon helped acclimatize me to the effect, but it still took a lap or two to get reacquainted with that sensation on the ring.
Before I get to just how awesome I think PC2 is, I wanted to first point out that it's not the real thing. I don't want anyone who reads this to think that any amount of sim time, PC2 or otherwise, will fully prepare you to drive at the limit anywhere IRL....and certainly not at the Nurburgring.
Also, the 86 I rented came with upgraded brake pads for the track, so while I experienced no brake fade in PC2 or RL, I don't know if PC2 accurately represents how the stock brakes hold up on the track.
Now that that's out of the way....
With respect to the Nordschleife/GT-86 combination, PC2 is freaking AWESOME!
All the sketchy parts of the RL Nurbugring matched the sketchy parts in PC2. -Not just in where they were but how the 86 responded to various inputs at those spots. It was freaking uncanny. I wouldn't recommend learning vehicle dynamics using *only* a sim, but the cause/effect relationship between the car, the track, and the driver's inputs, is well simulated in PC2 with this combo.
I made it a point to avoid the curbs most of the time as a safety cushion, but I did *sample* the curbs a couple times just to see if they were accurately depicted in the game and the seem similar to real life. The one thing PC2 can't convey is the mechanical empathy/guilt caused by using the curbs. In the sim, I so don't care, but IRL, I was thinking "I'm sorry car." It just felt like shocks and alignment's would suffer shorter lifespans if curb surfing was the norm.