CatOfNineTails, i disagree with that statement.
Not sure if everyone already noticed, but when we start attacking a mob, its hp bar starts decreasing as we do the 1st hit, but after that it loses its syncronization.. if we stop attacking it (and even un-draw the weapon) he will just die on its own! Cause he still hadn't received(in our screen) the dmg we did 1 second ago..
same big delay goes with everything else, trying to stun/silence a mob to prevent its casting and also moving away from the aoes.
and the worse is that the delay is totally random.. sometimes is a mere 0.1sec and can go up to 1.5seconds.