How rude, to be more obsessed with a dogs size than the dog itself. I won't deny that I love small dogs, but by no means will I belittle a dog in a specific breed for being "too big". Gordon is 10 lbs and as lovable as can be. People like that would probably sell of their Yorkie for gaining a pound too many.
Honestly though, if someone did that to me, I'd just roll my eyes and say "So that means my dog could beat up your dog, right?"
(I'd be joking, of course. I just wouldn't tell them that.)