EXACTLY! But because each breeder has their own opinion of certain genetic phenotypes that they want to enhance, doesn't mean they still don't fit the standard! That's the wonderful thing about breeding dogs. Is the you can enhance certain structural points to a certain degree, while still conforming to standard!
If you have the money to show your dog, I think it's a really good idea and will set anyone in the right direction to breed sound (structurally and mentally) Yorkies that conform to the standard.
Further, if you don't have a dog to put in the ring, or can't afford to, then still go and talk to these people. See what is out there and put your hand on these dogs. Talk to the judges. After their turn in the rings is when these breeders are more than happy to chat w/ the publie, but not until then!
It's harder than it looks!