The NY Times had a nice piece over the weekend looking at the various experiments in service and aircraft configuration that airlines currently are undertaking. I can’t think of another time in the airline industry where’s there been more experimentation in service. As the article points out, American is now testing an all-coach service from Boston to Manchester (England). Delta has tried an all-coach service (with added legroom) between Atlanta and Houston and Atlanta and Kansas City. Singapore and Lufthansa are trying all-Business Class configurations. Add in United’s all-coach TED and Delta’s Song, and it’s obvious airlines are trying to segregate their markets as much as possible, a smart business decision once they can figure out which routes should feature which service.