The reason for these results may simply be that extroverts pouriton a bit too thick for their own good, and this tendency negates any charismatic advantages they might otherwise enjoy.
In a column headlined "Pour ItOn" (a copy of which is attached), Safire noted a number of indications that institutions like the KGB are, to use Gorbachev's phrase, "regrouping" -- as opposed to undergoing the sort of dismantling that is so clearly required.