I seem to 'pass' pretty well face-to-face. Nobody has ever actually said to me 'Are you a tranny?' with the intention of embarrassing me. There was one occasion last October, on a dance floor (see 'Hello Barbie, let's go party' on 18 October 2009), when a youngish Japanese tourist said 'You are a tranny?' and invited me to come outside for 'conversation'. And on another occasion about then, a chav-like man said 'Hey, mate!' as I walked past him in the street. And despite the new voice, I got called 'mate' by a wrong-number male caller on the phone a week back. But these are isolated incidents. 99% of the time, it's 'madam' and 'darling' and 'love' with every sign that the speaker is perfectly at ease with what they see and hear. This is my evidence for saying that I pass in face-to-face situations.
But that doesn't necessarily mean that I really 'look like a woman' or ever will. I do try hard to look unambiguously female. I'm sure I succeed. But I suspect that I only look sufficiently feminised to make the situation comfortable for the other person. So that they feel the person in front of them (me) doesn't look strange, doesn't sound strange, and therefore won't embarrass them. So it really boils down to having a low personal embarrassment or awkwardness factor. I look the part, can be accepted as credible, and so everyone relaxes, even if inwardly they may be thinking 'There's something not quite right here!' or even 'That's a tranny, no mistake!'
Do I worry? No. I will in any case get 'better' as time passes, but meanwhile I feel safe from exposure, ridicule and hostility, provided I have regard to ordinary people's sense of what looks 'normal'. Just as when I was trying to play the man in years gone by. No change in behaviour at all, when you think of it!