Well, yes, they will probably nerf it sooner if their goal is still to get MoP out fast. But as with any of their "plans", I take it with a grain of salt. I mean look at Firelands and how fast that was nerfed. Still took a very long time for 4.3 to be done. They had a lot of big talk for this expansion and it was a let down for a lot of players. They just need to stop hyping their shit so much.
Besides look how many Annual Passes they have strapped in. There is absolutely no reason for them to get MoP out any time soon.