My Hannah is a silky and she only weighs 5 pounds and is 2 years old. Now that I've had a silky, I can tell the difference, but before I had one, I also thought silky was referring to the kind of coat they had. Honestly the only person who knew she was a silky terrier and not a yorkie is her groomer and the lady who owns the daycare she goes to. Otherwise, she's just referred to as a yorkie.
Congratulations on your new addition. I too favor Quincy for a name.