For all you doubters out there. I think it's time for you to watch Suzuki's 7:29 lap again. You'll find it here
http://www.youtube.com/watch?v=smxFKOlF_tk
Watch closely how Suzuki drives. He drives with full attack. He throws the car into the corners. He knows exactly how the car behaves and how it reacts.
HvS is an extremely talanted driver. But. He borrows a car from Nissan and he absolutly do not want to carsh it. Ask him yourselves! HvS says that he do not drive the cars he tests at the Ring at 100% of their limit. HvS simply say (1) I do not want to crash the car (2) I want to live tomorrow. Suzuki has no problems with that. If he crashes, just go an get a new car.
Remember, for HvS the time setting at the Ring is not a race, it's just setting a time. That's why he don't do 100 of laps in one car he tests and just a few in another. He always just go a few laps before he sets the time. Suzuki has probably done 1000s of laps in the GT-R.
So, the 12 sec time discrepancy between HvS and Suzuki is at least what I had already expected. Remeber, at the Ring, 12 sec i very little.
If you still doubt Suzuki's time in the GT-R, have a look at this video clip http://www.youtube.com/watch?v=k4CdizEYwyw
Do you think it's possible to do 8:08 in an "ancient" car with street tyres on a lot worse tarmac than today? No, of course not. But if you drive like a god, you can do it. What do you think about the time difference between the ancient 964 turbo and hyper modern 997 GT2 on semi slicks with better tarmac and track? "Only" 35 sec. Should be more, shouldn't it? No, not if you drive like a god and are 100% comitted. How many race drivers do you think could replicate the 8:08 time today? For goodness sake, HvS drove 8:03 with a 996 GT3. Only 5 sec faster. The differences should have been bigger. Just confirms that HvS is an extremely talented driver. But he just set a time. He could have gone faster, but that is not the thing with their tests. They just set a time that should be comparable with other times HvS has done.
Conclusion is that Suzuki's time is plausible, as is HvS time. No big issue. Just two different drivers with different commitment and prerequisites.