A FlyerTalk Posting Legend
Join Date: Sep 2002
Location: LAX/TPE
Programs: United 1K, JAL Sapphire, SPG Lifetime Platinum, National Executive Elite, Hertz PC, Avis PC
Posts: 46,978
I believe this was courtesy of AS booting CO (and NW, DL, AA) out of that elite checkpoint lane - CO must have arranged with SEA-TAC for its own lane there, which is closer to the B gates.
I'm hoping the CO line matron gives AS customers the same response I received when I tried to use the lane as a CO Plat after AS kicked us to the curb.