Thanks, JDiver and SquareDanceGuy. And I should have looked much closer, as there's another thread getting real-time replies with nearly the same question. Thanks anyway for answering - I'll call and have them update the PNR just in case.

The flight is AA 179 JFK-SFO, but SDG's post makes me think my question may be for naught on this particular flight. Excited to try AFS, though.