During the recent interview with Ghost Crawler and Ion Hassikostas, Ion clearly states an opinion on where hard core raid guilds will be when answering a question concerning whether he feels LFR is considered part of progression. In his answer he states that LFR is not p art of the progression path of hard core raiders and that "next week when 5.2 is released" they will be working their way through regular modes in Throne of the Thunder King.
This was obviously a slip as a date has yet to be officially announced however how many levels of slippage could it have possibly been?