I believe the number of women who think they pass when they actually don't is very high. There is a tendency to think you pass just because you finally see the girl in the mirror, or just because you get ma'amed a couple times. Remember that some people can tell you're trans but still ma'am you because they are being politically correct, while some people ma'am you at first sight but upon further inspection they can read past you.
I think every girl goes through it---the blind stage where they think they pass. I look back at pics from a year ago and can't believe I thought I was hot and passing when I wasn't. I am sure I will look back a year from now at my pictures today and will find things I can critique myself on. I think the journey to passing is a long one, and can take years. We didn't grow up female, hence what other girls learned growing up---proper makeup application, hair, clothes, mannerisms---we are only starting to pick up now.
I think I am about 50% on the way to completely passing, and that is okay with me. Transition is a journey and should be enjoyed.
Edited for language. Devlyn