I received a 16P1S instead.
It happens to behave just the way I expected from the 16P9S by examining dicer's scans.
PIF reporting is consistent between scanning speeds. (with the usual possible increase near the end at higher speeds with lesser burns/discs of course).
Only disappointment, PIE reporting is not very consistent between several passes of the same disc, so this drive can't be used to check media degradation. I don't mind, though, as I have my two NEC 3540 units for this purpose (they are incredibly consistent between passes).