Prior to the Annual Meeting in October 2012, the faithful and discreet slave was believed to consist of all those anointed on earth, collectively known as the remnant. However, at that meeting Stephen Lett discussed Who Really Is the Faithful and Discreet Slave. In the report on that meeting it said :
From 1919 on, there has always been a small group of anointed Christians at the world headquarters of Jehovah’s Witnesses. They have supervised our worldwide preaching work and have been directly involved in preparing and dispensing spiritual food. In recent years, that group has been closely identified with the Governing Body of Jehovah’s Witnesses.
The evidence points to the following conclusion: “The faithful and discreet slave” was appointed over Jesus’ domestics in 1919. That slave is the small, composite group of anointed brothers serving at world headquarters during Christ’s presence who are directly involved in preparing and dispensing spiritual food. When this group work together as the Governing Body, they act as “the faithful and discreet slave.”
See also the video at @ 06:35.
The Watchtower of July 15, 2013 pp.20-25 provided the same information in an article on "Who Really is the Faithful and Discreet Slave". Paragraph 10 reads :
Who, then, is the faithful and discreet slave? In keeping with Jesus’ pattern of feeding many through the hands of a few, that slave is made up of a small group of anointed brothers who are directly involved in preparing and dispensing spiritual food during Christ’s presence. Throughout the last days, the anointed brothers who make up the faithful slave have served together at headquarters. In recent decades, that slave has been closely identified with the Governing Body of Jehovah’s Witnesses. Note, however, that the word “slave” in Jesus’ illustration is singular, indicating that this is a composite slave. The decisions of the Governing Body are thus made collectively.