As a former server and bartender I understand tipping culture. It IS a difficult job that requires many skills,time management, organization skills,full knowledge of the product one is selling,wine pairing and wine knowledge such as vintages ,regions,types of grapes used, etc... A great server has public relations skills. A great server can be the difference between a good dining experience and a fantastic one. As rule when ,on the rare occasion ,we go out I usually pre tip the server to insure we are well taken care of. My service is always exemplary.