Just had my interview at JFK... Arrived at an empty Terminal 4 two hours early for my interview to find five CBP agents all eager to sort me out. In and out within five minutes, no questions, no checks other than looking at my passport! I think he thought I was bonkers to brave the snowpocalypse just for my GE interview
Received my confirmation email before I left the airport.
Told one of my colleagues who has been struggling to get an appointment, he rang in, and they told him to come straight down for an interview as they're not busy... So if your conditionally approved, in NY, and have a couple of hours to kill on the E train, I'd suggest giving them a ring ^