While I am sure there are some airlines that operate aircraft in an all coach config on a high-density, tourist heavy route like that, I know that DL flies it in a 2 class config. I tried my darndest to get into FC on my trip there, but they did not have any openings for FF reward tix. However, it was still a great trip, as I was with my girlfriend on the way over, and she was my fiance on the way back!
I also can tell you, that even if the 767-400s are designed for intercontinental travel, they will still have only two classes. Delta on its entire fleet has 2 class configs now as far as I know, just the international planes have an upgraded seat for "BizElite" class, which takes the place of both first and business class on international trips.
A woman drove me to drink and I didn't have the decency to thank her. - W.C. Fields