We've covered this issue before, Bob. Your focus is, naturally, on the mechanics. It is the center of your universe. That's to be expected. And yes, AA's mechanics are not now, nor have they been, the highest paid mechanics. I have never posted otherwise.
As WT has pointed out, however, AA's maintenance costs are the highest in the industry. That's a result of the pesky difference between wages and labor expense. You can be among the lowest paid but still cost the most (hint: productivity is usually the problem).
My posts are generally directed at overall costs, including the pilots and FAs, where AA's employees have been among the highest paid since 2003. Once DL pilots gave back $1.3 billion in annual concessions, AA pilots were the highest paid except, of course, for WN pilots, who were paid substantially more than all of AA's pilots except for the AA 777 captains, whose hourly rate was slightly higher. Now, of course, DL pilots have secured raises that bring their pay above AA's pilots.