Her coat should be able to let you know whether she has any Poodle in her. I breed both pure bred Yorkies and Yorkiepoos. The biggest difference that I have noticed in our little Yorkiepoos that happen to be black and tan is the wavy-curly coat that is a bit thicker than the pure bred babies.
Hope that helps. I too look forward to seeing a picture of your babies. I will try to see if I can post a picture of one of my Yorkie babes next to a Yorkiepoo to show you the difference. The one posing in flowers is a Yorkiepoo. The one posing on the shoe is a pure bred Yorkie.
Thanks,
Teri