Just got back from an award trip to Washington, and I was booked in Z. (Gold free upgrade from economy to new economy). Off topic, New economy was great, flight out was full in economy and new economy but only 2 up front, flight back was (almost) completely full. My only gripe was the entertainment system which caused the cabin service manager 20 minutes of grief running round reseting seats, and even then was slow.
If any one is flying transatlantic with kids be sure to order the special kids meal, it comes in its own container, with stickers and scenes to colour. Kept both mine quiet for half an hour!