Most people who comment loud enough for me to hear say things like, "Oh, look, she even has a little bow on her." This is when all she has is a hair tie on her with her hair up like a turnip head (Hubby calls it that. I call it a broom or ponytail LOL). But I've noticed that whenever I use a blue hair tie, people automatically assume she's a boy. I don't bother correcting them. When it's a grey tie, they seem more unsure and actually ask. Half the time, when they ask, I tell them she's a boy. The other half of the time, I tell the truth. I really don't see the difference whether they know it's a girl or a boy much like I see no reason most of the time for strangers to know what I had chosen to name her. So I even have a fun boy name we sometimes say is hers depending on mood and person interested.
Her jackets are gender neutral or lean more toward the boyish side too.
I've only maybe had to explain briefly to strangers twice before about her hair getting in her eyes if it wasn't tied back. There are times I like leaving it down and she can still see, just not as well, and walk her that way. She seems to attract less attention at that point so we are left well enough alone to do our thing.
I don't worry about it too much. Whether people think she's a boy or girl, they aren't making the assumption with rudeness as their intention. But that girl who called Couver a cross-dresser, I hope she was just too young to know better.