I haven;t played my mind controller much lately but in general I have been seeing this, especially with the "hold head" and "coughing" animations. For some reason though, Fossilize and Ice Block never fails to animate the "I'm stuck!" pose 
Makes me think some of them are "hard" animations which literally force the enemy to do it straight away, and the other ones are more like soft emotes which play at the earliest convenience.
I've noticed this for a while, but is anyone else seeing some Controller AoE holds don't cause the enemy to play their "held" animation until they take damage? Total Domination doesn't currently give much hint that I've hit a group until they take damage. Could it be my rig, or are other people seeing... err not seeing.. this?