I live in Atlanta Georgia, I just check "who pulled my credit" not enough people responded from GA to make a good guess... I really hope it's not EXP!
One the Who Pulled My Credit? website it looks like AMEX either pulls EXP or EQF so you've got a 50% chance right there hehe. I didn't see any entries for GA. Good luck!
WHen I applied for Blue, they pulled EFX. I got that but last week I got a pre Approval for Green rewards. For the preapproval, they pulled TU. BTW, I'm in MD.