I personally love this and wish my own restaurant would adopt it. One of my managers said some customers would be offended by it, though. Do you think it's presumptuous?
There have been customers who told me, who even told the manager, how great a server I was...and then leave only 10% on the table. I think sometimes people just don't do the math right even if they really meant to reward good service. *shrugs* Your thoughts, from the other side of the table?