After reading more information on INFJs, I'm convinced that people are mistyped as INFJs very, very often. Many mistypings are actually ISFJs, and some are ISFPs. Some may even be ISTJs because of their clear-cut sense of right and wrong, and possibly some INTJs for those who are focused on intellectual pursuits.
From readings on this and the INTP forums, everyone and their dog seems to have an INFJ ex and that is pretty unlikely imo. I can see how a person would assume an introverted feeler who is structured or inflexible is an INFJ, but that is not accurate. Their primary function is Ni, which is not women's intuition, but an extremely abstract approach to life. It is a rare type, very private, one of the most conceptual of all the types, etc. There are many introverted feelers who need a great deal of private time, have complex emotions, and a deep sense of altruism. These people are not necessarily INFJs. Most of the quicky tests don't really give reliable results. The INFJ profile on some such sites even uses the word psychic to describe them. That right there will draw in all the introverts who want (or worse think they have) super powers. INFJs are less than 1% of the population and withdrawn, complex, extremely abstract... it's somewhat unlikely the average person will get to know one well, let alone date one. Thoughts? This has just been my impression which could well be flawed.