My friend gave me a copy of that guide yesterday. 2005 Reference Guide for Employees of Star Alliance Carriers. They had placed a stack of them at the IAD RCC. It's quite useful.

Is it possible that the listed *A carriers are the ones that actually fly from Terminal 2? So, I think the reaction might be that it is highly unusual that someone will go to the trouble of going to the "wrong" terminal to use this lounge.