Definitions of objective used are:
-not influenced by personal feelings, interpretations, or prejudice; based on facts; unbiased: an objective opinion
-expressing or dealing with facts or conditions as perceived without distortion by personal feelings, prejudices, or interpretations
Most Objective: INTP...ENTP...INTJ...ENTJ: Least Objective
I'm confident in this assertion as it pertains to "the typical bearer of type," though I'm sure someone disagrees. As to its importance...Advantage could be gained in dealing with people of these types by way of adjusting initial trust. One who isn't as concerned with self-advancement or control as one is with remaining objective is less likely to deceive.