I'm harping on a theme - but I've just seen a Blizzard post coy on epic gems in 4.3 here .
My theory has been that the purpose of Epic gems is to nerf older content. There is a possibility that a very slow release of Epic gems may be used to gate access to deeper 4.3 raid content. Note: Having JC's with thousands of tokens, stockpiled pyrite ore, capped Justice/Valor/Honor points ready to pounce does not count as a slow release.
Player 1 : If they don't release epic gems in 4.3 i will be mad
Player 2 : Protip: they won't. Sometime mid 4.3, maybe, as an indirect nerf to the content. But not at the start.
Player 1 : i mad
Blizzard : A more useful reply would contain details of why, in your opinion, epic gems should be added sooner, how it would benefit the game as a whole, the knock-on effect to progression, something like that. You being mad wouldn't be a solid reason I can pass on to the devs :(
As JC's we are salivating at the possibility of gemmas (myself included). My advice is to be rational instead of emotional. Just because you want it, does not mean you get it.