I'm a gold and I've had K/G fares preclear. I've never seen anything to suggest that upgrades clear in any order other than the one that United described publicly.
Originally Posted by
golfingboy
As for "partially", two seats in E+ did indeed open up at the same time two seats filled up in F. Perhaps they only "allocated" 2 seats from the R bucket for comp upgrades. I seriously do not think the system is that sophisicated enough to "think" like that, but I could be wrong.
I'm confused about what the sophistication is here?
The CPU bucket is just a hidden bucket that is (apparently) a subset of the R bucket. Lots of buckets work that way, this one just happens to be hidden.