Doesn't mean a lot, just who paid the most to get their tyres approved as an OEM option to make money down the line. Porsche approved P Zeroes, 050A and PS2 for the 9x7 cars, and there's no way in hell you'd get me to put P Zeroes on a sports car! Luckily Michelin appear to be playing the money game right now and are getting the MPSS put on everything decent, which is a Very Good Thing Indeed.
As far order in terms of quality, or at least what I'd consider putting on a car, Graham's got it spot-on
I know fek all about the politics thank God