I wrote most of the club descriptions; I felt some description of clubs should be included, because they can be regarded as part of classical socionics, and they are referred to in writings by Aushra, Gulenko, Lytov, and probably many others.
By definition, the 16 socionics types can be divided in NF, NT, ST and SF types, just like in IJ, EP, EJ and IP types, and in the quadras, and in victim, aggressor, infantile and caregiver.
The issue is then whether the descriptions themselves are good or not. Well, any division of types into just four groups is bound to be imperfect.