Flew in on lh430 yesterday and all US citizens are asked to go through a computer kiosk to scan passports and pictures of adults taken. It prints a receipt similar to the GE receipt and if there is an "x" with any questions answered yes then you go into the CBP officer else you should your printout and exit to baggage.

Not sure if this has been discussed elsewhere. We had two adults and two kids. Kids passports will also scanned at the kiosk but no pic needed. Since we had baby food we marked yes for food question and it printed 4 receipts with x which we had to show to the CBP and get them stamped.

But the procedure is quite a bit quicker than the booth line.