How many trans women have you come across who have a typically male gender presentation?
Er.. can refer you back to karen jones again? They only wore feminine clothes on rare occasions to please family when visiting. Other than that, it was pretty much all unisex/blokey (if we must pick a gender) stuff.
FWIW, a lot of mutual friends did assume they either were or had at some point been male. My response was that they had said they were a natal woman, and it wasn't any of our business anyway, and i just continued going lalala & being mysteriously reminded of a mixture of Nicky Platt and misogynist teenage boys whenever I'd spent time with them (I trusted they were telling the truth about just being a v butch masculine looking lesbian, and was well aware of existing internalised and internalised misogyny within some lesbians, so it seemed legit.... ) 
Otoh, I did used to live with an actual woman who used to get the same assumptions made about her (usually by men). She was really tall, not 'conventionally' beautiful, and wore extremely female gendered (is that right?) stuff - short skirts and heels. I'm going to think a bit more about unpacking and unpicking that.