That's a very impressive list. I always check seatguru.com when I'm booking and so far it has been very accurate. That being said, airlines can switch out equiptment, but I've had good luck. It is a shame that the number of domestic widebodies is dwindling (blame it on oversupply since the airlines are encouraged to go bankrupt and contine operating). It wasn't long ago when you could fly a widebodie from LAX-NYC on Delta, American, and Continental (probably United too), and now CO uses 737s and 757s, Delta switched completely to Song, and AA is the only one still doing it!