Oh yes, now the whole fleet both domestic and international has been reconfigured in the MRTC configuration. Those new interiors are fantastic, new walls around the windows, new dark blue seats (remember in the mid 90's they used to be medium blue with gray rectangles) and more space between rows. Now you can easily stretch your legs even when you travel in economy class.
My first flight on an American plane with the new configuration was almost three years ago when American had just started the MRTC refurbishment program. That flight was a 767-200 from Chicago to Brussels. But now all 767-200's are pulled out of the Trans Atlantic sector, so are the A300's. Now, the only two AA aircrafts that come to Europe are the 767-300 and the 777.
You are going to love it.
Have a nice flight