Ogre rage working properly?

[Metathron]

I know that ogres are not a frequently used unit, so those of you who have used it, have you noticed anything wrong with their ogre's rage ability?

Example: My stack of 7 ogres attempts to attack a stack of 283 thorn hunters. Before activating ogre's rage, the damage "forecast" is 1260-1512 damage (212-252 kills) and after activating the ability there's absolutely no change. I thought an Attack increase of 37 would amount to a rather significant damage output. What the frell?