I agree with accuracy not being a major stat for tanks as your threat generation comes from your tank abilities and not from your dps output. That makes accuracy a real dps stat. Unless they changed this in 2.0
I always tend to say this to new tanks in our guild: "you're stepping on his sore toe making him mad while the dps rips open his back. And if boss dares to look away from you. You step on his toe even harder (taunt).