Need to agree with Noneed here, since ES is doing high dmg than it should.
It procs for my hunt too. Additionally, it has 20% to proc, by that means, is that it can/(NOT) Proc from the ticks.
And, i don't see any "proof" ... Try to demonstrate in a video.
Try to take a look in the comment's here http://us.battle.net/wow/en/forum/topic/13020742251