No, very much doubt it.. with more reason to be where they should be...

I mean.. they are 10.x AFR from factory when measured with the wideband.

My guess is that it was MUCH easier to tune the PE table for "accurate" readings on the tail than redoing the whole MAF/VE tables, since they probably use a "calibrated" MAF with its correct table. Add to that, that they want the car to be SUPER safe regarding piston temps and you get that 10.x afr on the PE.

Engines vary much in their tuning needs, even from the same production line. So the best "mean" tune is what they input there.