I just passed through in ATL and got sent to full blown secondary at the exit. I had to argue with the AirServ employee taking the CBP files to put mine towards the front of the queue being GE, which she confirmed with the CBP officers was the correct process - why an AirServ employee is working in an FIS Secondary Facility, I have no clue.
Waited about 10 minutes, and got sent on my way without opening my bags. Both of my friends traveling without GE beat me through, however.