I arrived at jfk at 4 pm, yesterday, 12/6/10. Several flights had just arrived and there were over 100 people on the taxi line (and it was growing)--spilling out to waiting area B's end. Pax using T8 beware. [Most of the time the lines are manageable.]
[PS: I parked my car with SmartPark, and they came withing 10 minutes of my call.^]