The waitstaff knows if you are using the plan they get 18%(I believe)...some DISers like to leave 20-25% and so they are leaving a supplemental tip...you do not have to do this(unless you feel you have had great service). I do not think they will think you have stiffed themmegand said:We have the Dining Plan and it says tip is included, I just wondered if that means you leave nothing on the table or what everyone else typically does. My biggest fear is to have a waiter/waitress think I've stiffed her or under tipped.