From the blue posts on the front page it looks like a whole month before LFR is opened.
2 weeks - normal and hc
3 weeks mythic
4 weeks LFR.
I personally think thats total BS. I'm pretty fed up with Bliz treating LFR players as second class sub payers. I can understand harder raids being delayed, but not easier ones.
I've never bought the "it feels less epic" arguement. esp now with flex in the mix. The people going after hard modes wont be hitting LFR.
Personally I just see this as a kick in the teeth to everyone who cant or does not want to raid to a schedule, which is what LFR caters to. I've done the whole progression raid thing, and moved on. They expect me to pay a sub for not being able to do the primary content the game is based around?