Well, based on that info, I would say that they aren't a recommended breeder by the YTCA (which I would go along with more than the AKC). They obviously don't adhere to certain recommendations for the best interest of Yorkies based on the age they let the pups go, the small breeders (especially the female), and no health guarantee.
If there are only 3 catagories: BYBers, Puppymills, and Reputatable Breeders - I would put them in the BYB catagory.
Personally - I think there is a middle ground between BYBers and Rep Breeders. I would put them in that area in MY own mind and opinion.
As said before - Jasper seems healthy and that is what is important!