Bait and switch? AA doesn;t even promise (nor does any airline, if you read the Conditions of Contract) to get you there on time, via the routing or aircraft you thought you'd use, etc. etc. never mind the aircraft configuration you thought you'd get. Never Hachioji! As we say in some professions RTFM.

To quote:

"RESPONSIBILITY FOR SCHEDULES AND OPERATIONS

American will endeavor to carry you and your baggage with reasonable dispatch, but times shown in timetables or elsewhere are not guaranteed and form no part of this contract. American may, without notice, substitute alternate carriers or aircraft and, if necessary, may alter or omit stopping places shown on the ticket. Schedules are subject to change without notice. American is not responsible for or liable for failure to make connections, or to operate any flight according to schedule, or for a change to the schedule of any flight. Under no circumstances shall American be liable for any special, incidental or consequential damages arising from the foregoing."