Keep in mind that the EGR keeps combustion temps DOWN and prevent KR in normal applications.
Paul doesn't have that worry because he keeps combustion temps down with injection. I would expect those rotors to be that clean. Even with an EGR, mine were that clean with limited testing of WI. For those that remember how it looked when I swapped to Gen3 before it went on John'* car.
Paul still would have dirty rotors from the PCV and fuel from reversion, but the injection keeps it clean.