The following is from united.com. It seems that premier with B fare has priority than W fare with GPU for long haul flight. Am I right?


The following is the order of priority, within five days, on flights that are eligible for Complimentary Premier Upgrades:
Premier members on eligible Y- and B-class fares, as well as Premier 1K members on M-class fares: Instant upgrades that weren't confirmed in advance, sorted by fare class, then Premier status
All travelers on waitlisted Global Premier Upgrades, Regional Premier Upgrades, and MileagePlus Upgrade Awards: Sorted by Premier status of the redeeming account, then fare class and time of request