I have some doubts about his actual race purity, I have a 3 month old Yorkie and he's already much bigger than a normal Yorkie.
The parents (Photo link below) seemed pretty legit to me although they were pretty big too. The person from which I bought him told me that they're not toy Yorkies, but since all yorkies are toys what can this be?
http://i1056.photobucket.com/albums/...67159296_n.jpg