Clearly some consultants somewhere in the restaurant business came up with this and has spread it throughout the industry. I, too, find it incredibly annoying. It seems designed to limit customer statements of dissatisfaction. Even worse, some places have gone even further and trained their wait staff to ask "Is everything tasting great?" Um, yeah, sure. Such a closed question is clearly designed to NOT elicit any form of real feedback while maintaining a pretense that the wait staff is actually interested in the customers.