I've only been using my GE card at TDC checkpoints since I got it in 2011, with ... "interesting" results- in what will surprise no-one, about half the TSA TDCs had no idea what it was, so if I had the time to kill I'd wait for them to bring a supervisor out to verify the ID, educating the rest of the staff in the process. Around mid-2012 or so they must have released the memo (... to everyone?) and I stopped getting funny looks.

In OAK they actually called the real cops on me ... crazy