Sorry, but that times out of PGR2 can show you how incorrect it is. The best times out of GT4 are nearly comparable to the real world, but also to quick, because you can drive faster if you won't destroy anything. But 6:40 is a lot quicker as this car ever will go round that track. It's impossible to do that with a road legal car on street tires. And it's also nearly that impossible with a real racecar on slicks. The best lap EVER was driven by Stefan Bellof in a Porsche 956 in 6:11.13 and that lap was in the qualifying (so not the official best lap). In the race he managed a 6:25.9. The works-956 had nearly 900bhp and was a real race car.
WRC - That's motorsport!
"If you can see the tree you are about to hit, it is called 'understeering'. If you can only hear and feel it, it was 'oversteering'."
Walter Röhrl