>>They announce it as "TWA flight xxx operated by TWA, LLC - a subsidiary of AMR Corporation".<<
I've been on over 40 flight segments all over the country since the takeover was official, and not once have they announced it like this. They continue to announce it simply as "TWA flight xxx." During announcements regarding frequent flier miles, they do say something to the effect that American Airlines is now their parent company, and passengers can choose to earn Aadvantage miles or Aviators miles, and that the Aviators program will end November 30th, blah blah blah. Otherwise, everything is still the same.
An unexamined life isn't worth living.