The nursery worker at our church actually said this to me when my son asked to nurse. He's only 19 months. All 3 of her children were/are formula fed. (And cry unattended, sit in their excrement for hours, destroy neighbor's property for the fun of it. . .)
Every week, I come home with a new "I can't believe she treats her children that way" story for my husband. It really is sad. I do think she loves her children, but they seem to be such an inconvenience to her.
So I was able to say to her "No he isn't! The World Health Organization recommends nursing until at LEAST two!" And she said "Really? Teeth and all?"
For some reason, her comment didn't bother me at all. Maybe because I already knew how she felt, and finally had an opportunity to present some facts.