Another interesting thing to note from the Dungeons and Raids panel of the WWI earlier today is the topic of Heroic attunements. We've known for some time that Blizzard has wanted to move away from reputation requirements for Heroic keys, and we saw an example of that in Magisters' Terrace. This was reinforced early on in the panel when Cory Stockton stated that there will be no faction and reputation requirements whatsoever for any of the Heroics.
This doesn't particularly surprise me, because Heroic keys at Honored is little more than a formality and way to waste a little gold. You hit Honored with most places just through leveling up, so by the time you're top level you can probably already go into those Heroics. Requiring Honored might as well be no requirement at all.
However, the possibility of a Magisters' Terrace style attunement was something I assumed they would do. Run the Normal at least once before the Heroic, or by completing some other type of task successfully. That, too, was shot down later in the Q&A. A question about attunements was answered with the fact that none of the Dungeons or Heroics will have any attunement at all, and neither will the first raid zone, Naxxramas. I don't mind this too much, it leaves it up to the player to judge whether they're ready for Heroics or not. I still would have liked to have seen some attunement quests for Heroics, because I think the added flavor or added challenges those quests could provide would add some depth to things. It seems we're not getting those, and I'll cope with it I'm sure, it just feels like a lost opportunity.