Just reporting back as a new Global Entry member! I was mis-directed several times, ended up going through the automatic normal kiosks and they were trying to steer me into baggage claim without talking to anyone, when someone finally understood what I was looking for, and I went to the right area (at DFW it was the other end from GE kiosks, in the "other passports" section, and the digital sign for one lane actually said "GE enrollment on arrival.") There was one person ahead of me being interviewed, I think he was having problems and was escorted somewhere else, then the agent interviewed me. Just verification of contact details, plus finger printing and photo, but it all took about 20 minutes as each step was processed on the computer. Got email shortly after and card is due in the mail in a few weeks. Was worth doing because the line out of customs was very, very long, and I was able to join the GE fast line with my new enrollment details.