According to Wikipedia, that puts it one second ahead of the Cosworth Type 25 STI Spec C, and even further forward of the Lotus Exige S, Jaguar XKR and Audi RS4. The other side is just as noteworthy, with the Mini JCW GP making a close inspection of the tailpipes on the Nissan Skyline GT-R R32, Mercedes-Benz C55 AMG, BMW M3 E46, BMW M Coupe and Chevrolet Cobalt SS, all of which scored the very popular time of 8:22. The caveat here is that none of of those other cars, before or after, was tested after 2010, most of them having been run in the early years of this millennium or the end of the last.
Not that the clock cares – 8:23 is still 8:23. You can watch the lap below, but since the video has the frenzied, upbeat editing of a Mini commercial, don't expect to see much of it.