The only airports that’s potentially correct at are LAX and JFK just because of the populations that enter through them. Richer major metro areas plus large hubs = more people with GE. Even then most people say they breeze through, but I have seen reports of lines at those two.
MIA, DFW, IAD, IAH, ORD, and PHL all have GE wait times of less than 5 seconds or less without the need for an app. That’s not every airport in the country, but those are most of the major ports of entry I’ve experienced or know people who have, and I can’t imagine the smaller POEs if taking longer. Also I’m not exaggerating when I say five seconds or less. That’s how long it takes the kiosk to take your picture and the officer to wave you through.
@Claire1994: if you apply for GE (you should imo), and get your conditional approval, do enrollment on arrival when you land. It will drastically cut down on any hassle because of the pre-vetting.
My husband uses MPC when he enters the U.S. because it also speeds things up, so it’s a good fallback, but like @OldUser mentioned, there’s less pre-vetting so higher chance of asking questions or secondary than GE.