I would put it this way, I don't know how much it actually says that the AD wasn't in town for a second-round loss. There's something a bit historic in the hockey game, just about none in basketball.
I could certainly see and AD ditching it to watch a second-round loss, but I can see enough logic in attending to not read a ton into the choice he made (plus, in a more sensitive world, just about no one is going to be like "That was a bad look, missing that 7 seed's second-round game").