MAD does have one in T4. I'm here today and its past the rest of the security lines. I was on the airport list for upgrade so I only have a coach boarding pass. AA agent wouldn't give me the stamp even when I showed her the printout from the OneWorld site. I went to the fasttrack at MAD T4, printout in hand, and again denied. They were pretty damned rude too. Don't believe what you read!