This article relates to the Myers Briggs Personality Type testing but could be referencing any personality test.
Having been subjected to various systems by my employers I have some experience in being typed. I have always been doubtful of the expected benefits of such tests and even more so when confronted with the results.
One employer tells me that my Hermann Brain Dominance Indicator shows I am extremely technical (agreed) but to the detriment of all other skills (disagreed).
Another employer assures me that my Emotional Quotient is such that I do not have emotions and am completely incapable of detecting emotions in others.
There appears to be a complete lack of evidence to support the validity or usefulness of any personality type testing.