A grade M01s are actually very good, better or comparable to the AM3 scans posted by MegaDETH and getit29. (similarly good results to A grade E01!)
It is interesting that you guys have mostly seen only junk M01s, whereas I have only seen junk AM3 - so we have opposite perceptions.
Scans - one of the better AM3s, one of the worst and one of the M01 scans that I could actually find. The AM3s were from a 20A1L @ 8x (pioneer burns were worse) and the M01, from a 212 @8x (actual burn date was start of 2007, reburn of old dvd image).
Mediatek chipset scans of the AM3s were similarly nasty, although with around half the reported PIF total.