SEA has been my base for the last year and the priority tag has always worked, that little I can say.
The rub always seems to be the north satellite ... anytime I'm coming home and tying up at n-term, the bags take forever and I've some times just popped into the club for a snack, coffee, email, wiz, what-have-you before heading to claim.
It's ridiculous because the nterm isn't that far away it's taking them an extra 10-20 minutes but then again, I don't know anything about the process of handling baggage. Then again, i've had them show right up and at a high traffic evening as well so go figure. It just seems like it's all about nterm. AS flies out of nterm and they supposedly get them there faster tho, I wouldn't know how consistent that is because i won't fly them and would find that "promise" a poor reason to select them.
I think eventually UA is consolidating at B, maybe it will get better then?