Actually they continued to rise throughout Wrath and only declined a little ways into Cata.
But even if what you said was true…what’s his point? That WoW sub growth slowed down at the start of Wrath, which was a year before RDF and three years before LFR and somehow that’s the fault of RDF and LFR? Interesting take that two systems somehow had an impact on subs before they were in the game.