"...Generally, by the time you are Real, most of your hair has been loved off, and your eyes drop out and you get loose in the joints and very shabby. But these things don't matter at all, because once you are Real you can't be ugly" (the Skin Horse)
Do we really need another way to classify people? I'm not sure this thing even starts describing people. Yes it describes team ROLES but people might not fit squarly into those holes.
I see a lot of these tests in my line of work and i'm convinced they're usually stricktly speaking worse then Mbti / socionics / common sense.