It apparently doesn't strike anyone as odd that they would save this mention for the last talk of the program. Which, presumably, is the last thing said and will thus presumably have the deepest impression on your mind... It continues to fit the pattern of my experience since waking up--the last talk of the program, be it an assembly or a convention, always mentions the 'faithful slave' repeatedly for some reason.
I don't think the speaker at 'my' DC said it quite that way, just encouraged everyone to study the July 15th WT. He also mentioned the 'faithful slave' 12 times by my count, which is more than it was mentioned in the entire rest of the program (which was maybe 6-7 times, I think).
--sd-7