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Message:: [QUOTE="Cringely, post: 2015602, member: 22271"]Bill Eckberg (current EAC president) has done a number of comparisons between TPG and EAC grades. I've also done a few sets of comparisons myself (but not published). While there may be a few occasions where the EAC grade if higher, I doubt you could count them on both hands.What Bill and I have found is that—on average—TPG Adjectival (G, VG, F, VF, etc.) Grades are typically one adjectival grade higher than EAC grades. That is, a TPG EF-40 will probably be graded as a VF-20 by EAC standards, a TPG F-12 will be a EAC VG-8, etc. Not all coins will show a 1 adjectival grade difference. Typically, the variation is about a half a grade on any given coin (1±½). My main point is that standards should be just that: a standard that doesn't change over time. That way we can compare apples to apples, not apples to things that morph onto oranges. If we allow standards to change, we do a disservice to the community.[/QUOTE]