I don't know where Mr. Betsy got his information, but it's wrong. I have verified with a friend at AA that AA is a participant in Worldtracer.

I also don't know where he would get the idea that other airlines can instantly tell a passenger exactly where his bag is at any given moment. Impossible so far as I know. If that were true, there would never be a missing piece of luggage. And I can assure him that Lufthansa CANNOT tell a passenger exactly where his bags are by "just a few taps on the computer". I arrived at FRA two weeks ago and no bags. They tapped and tapped on the computer, but couldn't tell me where they were. Finally after almost 45 minutes, they got a phone call from their ramp saying my bags had been misloaded into the container of bags scheduled to be transferred at FRA. Clearly Mr. Betsy's information is incorrect. He also seems to have a penchant for bashing AA, if not for baggage tracing, then for a lack of caviar during a financial crisis. He may be entitled to his opinion, but at least get the facts straight.