I hate to sound like i'm invalidating the reasons for this thread, but the whole thing strikes me as a semantic debate, as making a mountain of a molehill. I wouldn't "date based on MBTI" (if i chose to date at all) in the sense of weeding out candidates a priori.
("I'm very sorry. You seem like a very godly woman, and we have tons in common, but you're ESTP, and that's three letters different. Good luck!")
Obviously, if the MBTI is anything more than a smart person's horoscope, it reflects some underlying reality. As such, if i find myself attracted to a mate who is very different than i am, we would be wise to anticipate issues that might come up and assess each other's ability to deal with those issues in a compatible way. There are marvelous SJs who get this and can be very complementary to NFs in marriage, and vice versa, but frankly it's hard enough to suggest that you should be really careful before jumping in.
But that's true of any romantic relationship IMO....