Originally Posted by
BrewerSEA
No it is not. Sticker/EXP upgrades are based on original time of request even on the airport upgrade list. SWU/Mileage upgrades are ranked (within tier etc.) by check-in time if not clearing before the flight goes to airport control (approx T-4). If connecting you could even get higher on the list for those upgrades by checking in at T-24 at your origin.
Well this is news. Perhaps I need to read more on this forum, but then I ask, what is the point of the "Airport Upgrade Standby List" if there is no difference between that and the "SWU/Mileage ranking List?"