Originally Posted by
RSSrsvp
That is true, though that page has never had aircraft specific info to my knowledge.
I should perhaps have been clear that I was talking only about the AA A321t -the new transcon configuration with lie flat seats in J and F classes. This will likely not be an issue of the A321s without that feature. The A321t has only been in service since January 7, and no one at AA (reservations, checkin, or GA) seemed aware of the floor storage issue for carry ons until it became an issue for me.
Its just something to be aware of in the event that you are planning travel with a carry on pet.