I haven't been here in ages, and the BA 744 thread brought me back!
Anyway, as of last Thursday, all AA Europe markets get a 777, when CDG finally upgraded! So now LHR, MAD, CDG, and FRA get 777s. That's something ORD can't say!
I realize I'm replying to this about a month after it was posted...you can see how attentive I have been to things. I have actually seen G-YMMA and G-YMMC at DFW. Those were within 6 weeks of the LHR startup at DFW, and I haven't seen them since. It is nice that we get a good variety of the BA fleet...