https://en.wikipedia.org/wiki/List_of_Nürburgring_Nordschleife_lap_times
There ya go. Actual Nurb lap times. Scroll down to "qualifying" and "racing"
If, on a 25 km (edit: track), the simulation lap times are in line with the real lap times, then the simulation must be quite accurate.
Looking at the GT3 cars on the Nurb 24, those times look a whole lot like what we see in game. If this game were actually "simcade" as some like to say, the in-game times would be massively different, but they aren't.
I seriously don't know what people are looking for or what they are comparing against. I've been on race tracks with a bunch of different cars and motorcycles. I've been in properly prepped, dedicated track cars, an M3 with bald tires (and a bust rear suspension), another M3 (again with bald tires, but the suspension was fine), a Chevy 1500 pickup truck, a Dodge RAM 1500 pickup, a bone stock Yaris, and my own daily drivers for good measure. Toss in various tracks with various track surfaces (FYI, proper track asphalt is AMAZEBALLS compared to regular street grade asphalt). That's my frame of reference and I have to say, this update feels pretty damn good in comparison.
(The biggest difference I feel is that the blood doesn't all rush into my face under braking.)
I'm skeptical of some of the comments in this thread. Comparing against other sims as a frame of reference assumes the accuracy of those sims and is also viewed through the lens of their simulation choices and methodologies, which will vary in terms of relative accuracy.
Let’s not forget that GT3 cars are designed to be easy to drive due to the fact that a huge majority of GT racing drivers are amateurs and “gentlemen drivers”. A MR GT3 car shouldn’t be on the brink of spinning out through every corner. I’m happy with what we have now, it’s might not be the most realistic driving experience but it’s a good step in the right direction.
Not to mention that Ferrari, a company with a history of winning, would quite likely not make a race car that spins if you look at it the wrong way. The same goes for Lamborghini, who, let's not forget, is leaning heavily on data from Audi.
The pre-1.32 Ferrari handled very much like the aforementioned M3 with broken suspension. I think it's a safe assumption that the real car does not handle this way.