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Bob"Crazing" is a normal procedure for these (T207) cards although you can find plenty that don't have this problem. The surface finish of the cards makes EX or better cards look stunning but a crease can make it look like Route 66.
That said, I don't know if I would call them condition sensitive. The E94s are a good example of a condition sensitive card. You have to be very careful handling a raw E94, especially removing it from its holder because the card can chip and flake easily in the color area. That is one reason I have all my E94s slabbed, for protection sake.