It wasn't my UOA, but I have read them. I've got a PYB sample or two laying around for a UOA that I will get to one of these days for the sake of interest. Maybe I'll do the same as I work through my Delvac 1.
I've definitely seen some odd UOAs on these engines. Some guys have top end synthetics and drive like grandmothers, yet the oil is sheared like crazy. Others are driving normally and using something fairly basic, and the viscosity holds up. Of course, you go to the G37 forums, no one trends anything properly, so you can only get so much out of the UOAs.