World of WarCraft on a MacBook Retina 13''?

[Lefeng]

Perfectly fine if you don't do 25m raids (LFR as well).

Incorrect. I've never had any trouble running LFR (I haven't done 25m normals). Every aspect of the game works fine, probably averaging 30fps, dropping to 20fps in moments of high AoE. That's enough to have a satisfactory gaming experience. It's not going to deliver bleeding-edge performance but that's not what a MacBook is for. For the average gamer a MacBook delivers good enough performance.

[BicycleMafioso]

Incorrect. I've never had any trouble running LFR (I haven't done 25m normals). Every aspect of the game works fine, probably averaging 30fps, dropping to 20fps in moments of high AoE. That's enough to have a satisfactory gaming experience

That is mostly what he was saying as well.
To most people, 30 FPS average is not acceptable, because half the time it will be lower.