i get pretty much the same comments...
"are you sure she's full yorkie??" or "is she a silky??" or the one you guys already mentioned "i want a yorkie, but i want a teacup" it REALLY gets to me... i almost went off on my boyfriend's friend's wife... but i just bit my tounge and told her that there is no such thing as a teacup adn that the smaller doggies are prone to more diseases, etc... same thing yesterday with the aunt of a girl i was babysitting...i told her about puppy mills, added diseases, inbreeding, and i think she was willing to do a lot more research, so that made me happy... usually i just get a look, like i'm the one who is wrong and i have no clue what i'm talking about... i try to close with "there's a forum called yorkietalk, and you can find more info on there"