I have met with snobby as well.  My Rico is 12.5lbs and my Benjamin is 12lbs.  I always follow up their disdain with the tale of my first yorkie 20 years ago that was small and was sickly.  That is why I wanted a pure pet quality companion.  I know that there are many small yorkies that are very healthy but what I went through was pure ugly and painful.  My Benjamin's line all lived an average of 17-18years (back to great great grandma).  
 
However, the most snobby of all was on a trip to Petsmart.  Ben noticed a cute little girl in the basket next to us.  They really liked each other and I made the mistake of asking if she was part yorkie. She was very snotty and told me "NO, she is a very RARE norwich terrier, don't you know how much they cost?"  Well, next thing I know they start getting flirty.  He gave a flirty woof and she gave a cute little ruff.  Her mommy grabbed her and scolded her, walking out of the store.  Everyone in the store nearby was laughing.