I fly LAX-SEA tomorrow night (Friday) at 9.22pm.
I am Premiere Exec.
My "complimemtary" upgrade cleared 72 hours out - on Tuesday night.
I just went to check in and I got a "congratulations you have a complimentary upgrade" type message.
As I said I am Premier Exec and the planes between LAX and SEA are actually small United Express Canadair Regional Jets - so I am a bit surprised - but happy - to get the upgrade!