Originally Posted by
ThreeJulietTango
I would open the lane, keep your priority boarding pass visible, and wait for the agent to acknowledge you. I've yet to have any issues with boarding through the priority lane midway through the process, even with LUS agents, and am not aware of any policy changes.
Per the AA.com website regarding elite status benefits:
"f you arrive late to the gate, you may bypass the General Boarding lines and enjoy the convenience of boarding anytime via the dedicated Priority boarding lane. Just show your boarding pass, and you'll be on your way!"
GA in this case was either uninformed or willfully ignorant.