Okay, I'll try to post pictures:
Kayla:
http://i37.tinypic.com/21ki51w.jpg
Kayla laying in my bed:
http://i36.tinypic.com/flvlnl.jpg
Kayla at the dog park:
http://i38.tinypic.com/dg591i.jpg
Here she is with my chi mix, Ella. Ella is about 11 pounds, just for comparison.
http://i37.tinypic.com/makpiq.jpg
Okay, I hope these all work!
I think the thing that made me start to wonder about her "yorkiness" was not her large size, but her facial features. She reminds me of a bigger, sturdier terrier in the face, like a cairn, with the longer nose. But, she was a puppy mill rescue, and I sort of think that their records would probably be right. But of course I don't know exactly how that all works, and I haven't really seen any official paperwork on her yet. So what does everyone think? Yorkie or silky?