This anointed class is just a non existent phantom the JWs have always been run by a select few at the HQs, a couple of people until the 1970's then 10 or 20 individuals after the GB took power in the 1970's. These are the real power while the rest are just space fillers. In addition the separation of the body of christians, though of course the JWs are not a christian church by any stretch of the imagination but rather an aberrant cult, into two categories is a gross distortion of the biblical teaching.
In all my time as a JW I could never understand what set the so called anointed apart since they didn't seem to be doing anything that the other JWs didn't do to mark them out as a different class. As for the GB members and the past presidents of the WTS it is well known that they are/were anything but exemplary christians and it's a mystery how such spiritual miscreants could receive the so called heavenly calling.
It's no wonder why the stats do not add up.