There's the trans-gendered (male to female) mathematician who'd disagree. She says that when she used to give talks (as a male) she got respect, but now people say things like "Her brother was better" not realising it's the same person.
He's talking about the difference between the response to a male and female, in other words highlighting sexism rather than transgenderphobia or whatever you call it. Thanks for putting yours on display though.
Joan Roughgarden (biologist, founder of the Earth Systems Program at Stanford) and Ben Barres (a neurobiologist also at Stanford) transitioned in opposite directions and reported the same phenomenon in mirror: Roughgarden saw people assuming her work was suddenly less important, Barres saw people in his field not realizing he was the same person and commenting that his research was so much better than his sister's. He authored a commentary in Nature 442 (p133-136 (13 July 2006), DOI:10.1038/442133a) that's worth reading. They're certainly not the only ones!
(I'm trying to find the article, which is hard because there's many transgendered mathematicians.)
Try to use a little empathy, and imagine (if you're a man) waking up in a woman's body tomorrow, and having everyone treat you as if it's always been that way. Might you not want to try to have your body express what you feel you are internally?