I have yet to see a line for the GE machines. I see them more times than not for the APC machines, and they're not helped by people no having a clue what they're supposed to do at the APC machines, although that will change over time. Once I've cleared the GE machine in ~2 minutes I'm out through the GE customs line in ~3 minutes including walking, while the APC users line up as usual. In most instances I'm out of the airport in under 7 minutes - or 10 minutes for DFW because they make you walk further for no good reason.