A survey has ranked americans' favorite fast-food burgers, with some outlets suggesting a specific chain has taken the top spot for the third year in a row, while others indicate mcdonald's may be a favorite overall, but not necessarily for its burgers. The rankings appear to vary depending on the criteria, with some focusing on customer satisfaction and others on specific menu items like burgers and fries. It is unclear which chain has been ranked as the overall favorite or which has the best burger.