After noting that my BOS-SFO flight tonight was changed from a 757-200 to a 767-300, I called to verify the status of my upgrade request.

Phone Agent confirmed the equipment change and told me that I was on the Priority Waitlist for the upgrade to the next cabit, but that the waitlist has not cleared yet. The Agent further commented that all names on the prioirty list would clear first before the "2nd" waitlist.

Is there really such a thing as a "priority" waitlist? Or is this just something the phone agent made up?