My best friend just took the Myers Briggs test again, and came out as being an INFP. (Which she is soooooooooooooo not).
I've taken the test a handful of times over a span of at least five years, and I always am an ENFP, though once I scored an I, instead of an E.
Also, whenever I research material on my type, I am astounded by how accurately it generally depicts my personality.
Lastly, I just don't think most people are self aware.
Which begs the question, are phonies even aware that they're phony?