Recent HKG-TPE sector, no mileage accumulation economy class. During check in, they offered upgrade to P.E. "because economy was very full" and I said OK, expecting the old 747 combi with 10-15yr old seats.
At the boarding gate, my boarding pass was rejected by the machine, and they said I've been upgraded to PL. As I stepped into the aircraft, it was the B777's used for transpacific... I was pretty happy with the upgrade but the flight was almost too short to enjoy PL.
On another note, during the ~20 transpacific crossings I made in the last 2-3 yrs, was op-up'ed once from PE (either v or q, i forgot) to PL.