4Gamer Interview with Yoshi-P!

[Zojha]

While players would naturally gravitate toward the single-target stuff for high end raiding play, a choice like that could still have consequence since dungeons (which have a lot of AoE) are still a significant amount of the game's content.

And then everyone cries for dual specc ._.'

Forgive my cynicism, but WoW has been there.