To brain storm a better method: 5 CDs, 3 damaged in varing degrees, a simple program to read and generate quality reports and c2 accuracy from those cds. Said CDs are mailled to people interested in testing certin drives, so the question is who is in? (and what drives do you have to test).
I am convinced the DAE Quality test might not represent a drives ability to read a pressed CD with scratches, rather to read a CD-R with artificial marker damage.
For any consistancy the same cds have to be used.