Great Topic.
I would say that most men are the ones who clock me first, or at least make a point of letting me know(BTW, that's a good sign that at least your being noticed... LOL). Women, who tend to be nicer to me, either don't clock me or just don't say anything.
Now, without going off-topic or sounding inflammatory, I think all trans men and women should just be prepared for being clocked or mis-gendered once in a while and not take it so personal; however, I am not saying we should eat people's verbal-excrement either, choose your battles.
In the long run we are not fooling anyone... in 500 years, if our bones were dug-up what gender would an anthropologist say we were? Yes, at a minimum, our pelvis will give us away each time....
< Hugs >