-1, They pulled TU for me in N.Y.
How many times has AMEX pulled only TU for you? Last year at one time their EX connection was broken an they pulled TU for a couple days. I know a lady who got AMEX cards with only a TU hit, but that's about the only time I've heard of it.
I have had AMEX pull TU on occasions where I've done a 3-for, but that was on top of pulling EX. It also could be something they do when EX is frozen and you give them pin, but I don't have any way to substantiate that...it's just my speculation.