I just took CX881 LAX-HKG in J. Upon boarding, I asked if they could serve my meal about six hours into the flight, as I just had a good dinner in the QF First Class lounge. The cc serving my aisle was very accommodating, telling me that I shall just inform them after I wake up and that it takes 20 min for them to heat up the meal. I then just collapsed after takeoff. After six hours of sleep, I came to the galley and ask if they could heat up my meals. They agreed, and quickly brought my meal. The only downside is the lack of appetizers, but I got my main course (pre-ordered) and the fruit/dessert. I don't know if my DM status helped with this arrangement.