Originally Posted by tennisguru

Also under the AA system connecting passengers at the same overall priority level go ahead of people who are originating. So if a person is going TPA-ATL-SFO, that person would have priority over a person just flying ATL-SFO on that leg, even if both use S2s. So S2 connecting goes ahead of S2 originating goes ahead of S3 connecting goes ahead of S3 originating, etc.