Hello and welcome!!
We've never had a female yorkie before. We have two males. They are still puppies (five months old and 8 weeks old). Our five-month old was potty trained in two weeks flat. We brought him home when he was 8 weeks old and by the time he was 10 weeks, he was about 80 percent trained. He would have accidents but that was sort of expected (he was still very young). At five months, he is about 90 percent potty trained. The accidents happen when the humans accidentally leave the bathroom door closed (he is trained to potty in the bathroom). We are currently crate training the 8-week old and he's doing marvelously. I write down his potty times in a notebook so I can get a better idea of his potty pattern.
I researched and read about yorkies a lot before bringing the boys home (I love researching. It's sort of what I do for a living).
Here are some blogs about male vs. female yorkies.
If you haven't checked them out yet, here are a couple of links...
http://www.ryorkies.com/mvf.html http://miniatureyorkshireterrier.blogspot.com/2007/12/male-yorkies-vs-female-yorkies.html
Of course there are exceptions and different people have varying experiences that will sway the vote; therefore we read and researched as much as possible. We made the decision to bring home two boys and have no regrets whatsoever.
We are having so much fun with our boys. We wish you the best of luck in finding the perfect furry.