As expected, Nissan has responded to Porsche's claims that the GT-R isn't quite as fast as they say it is. In fact, representatives for the German automaker suggested that Nissan may have used racing slicks to achieve the 7:29:03 lap time of the Nürburgring. Says Nissan, "The final word from us is that it was done on absolutely standard tires which are available to customers in the showroom. They're not trick tires - absolutely standard tires, normal road tires."