AA80 DFW/LHR on Saturday 5th August-
Booked in W, and confirmed to J via SWU. On boarding- called overhead by name after CK boarding called- and told 'seat reassigned' and handed F seat.
first ever double upgrade.
as to the experience in first- its ok. its in my mind only incremental above J. Probably the least difference between any 2 classes on plane is J to F on 773 to me.