US immigration opens at 04h30 and there are about 6 officers processing pax. At 05h00 all the booths are open.

We use to line up in the FIS area waiting for the 05h00 start time. The line would go through the duty-free store. However, now that it is open at 04h30, there is rarely a line up inside the FIS area. I use NEXUS but when I glance over I would say the line up at 05h00 would be no greater than 5 minutes. Nothing like the 20 to 25 minute wait I use to experience weekly before I had my NEXUS pass issued.

Cheers