I have busted out several SGC cards and submitted them to PSA and here are the results.

76 Don Sutton SGC 92 now PSA 8
76 Willie McCovey SGC 92 now PSA 8
76 Rod Carew SGC 92 now PSA 8
76 ERA Leaders SGC 92 now PSA 8
76 Victory Ldrs. SGC 92 now PSA 8
76 RBI Ldrs. SGC 92 now PSA 8
76 Steals Ldrs. SGC 92 now PSA 8
76 RBI Ldrs. SGC 92 now PSA 8
76 Rich Gossage SGC 92 now PSA 8

76 Aaron RB SGC 84 now PSA 8PD
76 Willie Stargell SGC 92 Now PSA 7
76 Mike Schmidt SGC 86 now PSA 7
76 Brooks Robinson SGC 84 now PSA 7

76 Babe Ruth AS Sgc 88 Now PSA 8

80 Topps Fisk was SGC 96 now PSA 9

Something is wrong when 92's become PSA 8 and one 92 becomes a PSA 7.

So much for the predominant PSA = Easier Grades theory!!!!!!!!!!!!