Great topic as always Medusa!
An interview with Fallon was aired on Brian Gumble's show, Real Sports. It was interesting. And it should be noted that her winning streak was ended by a woman who was born in a female body. Fallon's loss was because she came up against a better opponent. Period! Clearly there was no "advantage".
I think the only thing she or any other athlete should be judged on is what she does in the sport. Her record does not indicate that she has any advantage. I found this article and it somewhat articulates what think on the subject.
Article
Do I think she or any other transgendered athlete is obligated to disclose personal information? No. Why? Because I still have not seen scientific data that shows she has any kind of advantage. And because what's in her bra or shorts is no one's business. She transitioned. She went through everything to become and compete as who she felt she was.
As to the matter of the photo Vagina posted, (paraphrasing here) so we could see what she was competing against...
1. There seems to be an assumption about what MTF players would look like and how they would perform. Not all MTF basketball players would be tall or taller than women who were born female. And there are people who were born in male bodies who were short (5' 5") who were able to out leap taller and more muscular players. Ex. Tyrone Curtis "Muggsy" Bogues. Somehow, he was able to dunk on his competitors yet he did not look like who he was supposed to compete against.
And that's all I will say on that for the moment.