Here is the WTS official spiel as of 2007:
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w07 4/1 p.22 par.5 Loyal to Christ and His Faithful Slave***In line with Malachi’s prophecy, the composite sign that Jesus gave his disciples to enable them to recognize the time of his "presence and of the conclusion of the system of things" included the identification of a collective "slave." Jesus stated: "Who really is the faithful and discreet slave whom his master appointed over his domestics, to give them their food at the proper time? Happy is that slave if his master on arriving finds him doing so. Truly I say to you, He will appoint him over all his belongings." (Matthew 24:3, 45-47) "On arriving" to inspect the "slave" in 1918, Christ found a spirit-anointed remnant of faithful disciples who since 1879 had been using this journal and other Bible-based publications to provide spiritual "food at the proper time." He acknowledged them as his collective instrument, or "slave," and in 1919 entrusted them with the management of all his earthly belongings.