We've discussed this time and time again. What I wonder is several things - what is the real power of a stock GT-R?
Could a car that heavy even with all that fancy technology and AWD etc be as fast as it's competitors?
The Truth About Cars link posted earlier actually does a good job discussing the situation. If this and other claims are true - and I would side with them - then it is clear that Nissan's time is dishonest.
EDIT: A funny comment from a Jalopnik commenter:
Perhaps Porsche should verify the 'Ring times of all the vehicles in the world. Maybe it'll show what they suspected all along; that the 911 is the Nurburgring champion and no other manufacturer can produce a faster car than Porsche. I mean it must be true, Greta from accounting drove all those other cars on the 'Ring and she couldn't get the times that the other manufacturers are claiming.
Porsche should stop whining and just stick to charging $1,000 for a clock on their ass-engined Nazi slotcars.