Hi, I would like to welcome you and Amanda to Yorkietalk. You're right, yorkies do take more time than other dogs; I don't know if it's due to their size or independent nature. We do have a training forum that offers lots of suggestions on training, and I found this link useful.
Free House Training for Puppies and Adult Dogs - No More Accidents Starting Today! Are you planning outside training, pee pads, or both?