Having now watched the two videos above I would say this...
I think the Nissan is like each and every new Skyline before it in that it moves the game on in terms of its use of technology, its breadth of abilities and its performance. As a road car I think you would stuggle to find a quicker A to B machine today, but then like every other Skyline I think once the initial hype has died down its lack of 'event' or 'purity', though somewhat subjective perhaps, will be its weakness.
I was actually suprised how little gap there was to the GT3, I expected the Nissan to be MUCH quicker in that situation, which I think was a great test actually. Get in, one warm up, one quick lap and in. In such a situation I suspect most people would be much quicker in the Nissan and be much closer to exploiting its abilities due to the cleverness of its design. I am a GT3 fan of course, so perhaps have a less than objective perspective, but I don't think I would want to spend £60K on that car when I could have a 996 GT3 RS and would never consider cancelling my order for the Mk2 GT3 because of how quick the Nissan is, or how better a road car it may well be.
You see I don't really care how much quicker the Nissan is than a GT3 because it will NEVER be close to a GT3 in terms of the fun it provides on a Sunday morning, the challenge it offers the driver or the sheer feel it provides, Chris Harris reflected that I think, and I suspect (and hope) the Mk2 GT3 will move the game on again. To many this will mean far less than its outright pace and on this point the Nissan is simply astonishing, but to many of us its more important. Amzing bit of kit mind, and I suspect on this forum and many others it will be simply the best car out there and even in my eyes for the money its astonishing!