Don't know whether this will add to the discussion but...
Back in 2006 a former board member and I conducted an experiment. I took 10 SGC "AUTH" T206 cards, cracked them out, and submitted them to PSA. The bet was on the over/under as to what PSA would do. My buddy was so sure that PSA would reject most, if not all, that he agreed to pay the grading fees of more than two passed muster.
The results: (Remember all 10 were graded "AUTH" by SGC)
2 PSA 4 (Including a McGraw)
3 PSA 5 (Including Speaker) and
1 PSA 6
6 out of 10 received numerical grades.
