For the record, this morning I nabbed a flight that looked like it was going from JFK, called Big Apple at about 9AM asking if they could come at 1130AM. The answer was that they might be up to 30 minutes late but they would keep letting me know.
Three e-mails and a phone call later informed me that the car would be there for me at 1135. Just for more grins, the trip out to JFK was easy with almost no traffic in the snowstorm