It could be much worse, my friend. My godson has CP & is in a wheelchair [well, now its a Rascal scooter thing]. At the mall or movies, people will just stare. Mostly, it is because they just don't know what to say. Often, they are surprised that he speaks so well... they look at the body and assume he's retarded [or whatever the current PC term is]. I commend your waitperson for, at least, trying to be conversational. She was probably trying to put you at ease. Whether or not it worked is your decision.