My one remaining question is: Will the Delta One check-in area have an exception to the 6-hour bag drop rule at JFK? If you're traveling with checked baggage, my best guess is you likely couldn't get to the airport any earlier than the 6 hour baggage drop time. If you only have carryons it seems like one could, in theory, spend as much time as they wanted in the D1 Lounge on the day of departure. Would that be a correct interpretation of the two scenarios?