For those of you who have flown on the JFK - Delhi non-stop flight any personal experiences (positive or otherwise) in getting an upgrade from premium economy to business? Am flying at the end of January, think it's well beyond the peak travel time but how often is business totally full? I am exec plat, already requalified so assume I have a reasonable current mileage and would be using a SWU. Based on this assume I would be well placed on the upgrade request list.

Any insight would be much appreciated.