Those cars were done for TAS so of course they are a little more over the top than what each and every GTR owner would get. That being said, the GTR is a huge car and while 22" wheels may not be the purist choice, I'm am quite sure there will be a large market for them here in the US (as there are a lot of M6's with 22" wheels now). The OEM rear tire on this car is the same size as a BMW 7series!
More information of the 22" fitment on New Skyline GTR
http://iforged.com/press/jan11/jan11.php