Has anyone noticed that a lot of high end motors from Porsche and MB use Pirelli p zero tyres yet they don't come out on top in any tyre tests.
Porsche and other manufacturers do not tie themselves into one brand or type of tyre.
A Porsche Pirelli PZero may perform slightly different on a Porsche to a Golf or BMW, the Porsche Pzero are made to a Porsche spec such that the tyres have to conform to a Porsche N rating..... You cannot fit a non approved, non N rated to a Porsche and maintain the warranty!
I have driven a few 911 over the years with various Pirelli's fitted and although they are not first choice, they are certainly usable within road driving limits.