I'm really really late but I'm sorry, Blair is not "very convincing", he photoshops to hell and back, only looks vaguely kinda feminine under the controlled lighting he films with, doesn't pass at all in candids, pads his hips in the wrong place, etc. There are no TiMs that pass, they all have giant male heads, hands, etc. The head size is the best give-away. I actually think some, maybe even a lot, of men are bad at clocking them, though. So that might be why he had trouble in the men's room.

The only TiMs that can come close to passing are the male eunuchs that were castrated very early in or before puberty. Basically modern day castrati, but brainwashed by parents to live as girls instead of singing opera. And they still end up looking more like overgrown male children than actual adult women when all's said and done. Plus, they are permanently mentally and physically under-developed, basically permanently stunted in a child's body and mind, so not worth it to 'sort of pass'. Lupron should be illegal to prescribe to kids.