My own opinion is that certain people, like me,will be assumed as TS by the same people who would think certain GG's are TS. So, I'm not sure you can call this being read at all.
Outside my own neighborhood were they know me from before, I've had no problems at all, besides guys checking me out.
Yesterday, for fun, we did an experiment, me and 2 friends walked 20 feet and 50 feet behind me while we walked for quarter of a mile on St-Catherine (A very busy commercial street with tons of very varied foot traffic from children to grandparents, from the stars to the dowdy, people of all cultural backgrounds.
They had their eyes/ears peeled for the tells of being read. A typical one I had from couples in the early months of my transition before HRT kicked in and I had a slight FFS. Some men's eyes became larger, then after I passed by, the guy said something to their girlfriend and then the girlfriend turned around. Since I transitioned when I was probably 90-95% passable, I've seen plenty of the "read" signs.
What my friends saw from women, teens, elders, childfren, no reaction, from men alone, 3-4 turned around to check me out (very characteristic head turn). In couples, women were looking a their guys while they passed by me? I often see that look from a woman in a couple when a possible competitor is around. That's all, 1000-2000 people went passed me and not one twitch NOW. It was not always the case, I remember how it was before.
In my case, if I look at the stat chart, I know that its my height that stands the greatest chance of "outing" me since there is no way to hide it, and in Montreal there is very few women as tall as me. So if in a bigot's head every tall women is a TS, they'll obviously I will be lumped into that group, one of those few tall women will also be lumped in there. That's the kind of "read" that any TS women in a society where women are much smaller cannot avoid regardless of how they look if someone is anal enough to just looks at heights in a social interaction (disregarding everything else); most sane people don't carry a stat chart in their heads and don't care for that kind of details even on a subconscious level.
In general, those that can "read" TS, probably shoot so broadly as being a bigot to 5% of the female population that's outside their own norm in any way. They're the same ones bashing men that are not "man enough"or insulting overweight or ugly women.
The last 1% of passability rarely matters I think in life. If your, like Mawd and most TS women here, and are sure of who you are, why let the dumbass who would clock a GG bother you?
An unpassable TS is not that it takes most of the pop an antropometry chart to notice, they are quite obvious to all. If we did the same experiement as I did, I'd bet that they'd be reactions from 1/5 to 1/4 of the people that person passed would react. I know the reactions from this minority can be not very pleasant (from my early not so passable days); the most unpleasant ones are when people have to say in a loud voice that your a man so everyone around will hear.
I have a mixture and compassion or disconfort when I see such a woman. But, as I've felt better about myself, I've felt less and less uncomfortable of being seen in public in their company. I think that the disconfort is a reflection of our own insecurities up to a point. If you feel sure of who you are, how you look, it seems to matter less what others think and more what you think.