I was erroneous, thanks for pointing that out. It is 1.5x miles for First. I am AA Gold so I get .25x mile bonus for a total of 1.75x (not quite 2x). I think the original poster was platinum so they get a 100% bonus yielding a total of 2.5x (or 3x?).
As far as the 777 coment goes, I should explain better. The LAX-DFW segment of my itin was F in Md-80. The A/C is now 777 Atlantic config, which is quite a change! It was a little bit of bragging but intended to reinforce the point that sometimes these changes can be GOOD!