One suggestion go to puppyfind.com and check out the pictures of the yorkies there. I am new at this and I will be picking up my puppy in a week from the breeder localy but she does not look like the yorkies I have seen. She looks a little bigger. and hear features look bigger as well. Did she tell you how much did the parents weight? Will she be able to give you AKC papers?
Let us know how it goes
One suggestion I have go to the
American Kennel Club - Online Breeder Classifieds they have classifieds there from breeders who may be local to you.