I've seen it drop once in about 40 kills or so with my LS, we almost always proc blue. It's just a low droprate all around, SE's way of still giving us a big middle finger while giving us so much awesome new content.
90DRG 90DNC 90PLD 90COR 90RNG 90THF 90BST 81NIN
<Insert random accomplishments and/or merits that no one else cares about here>
In my day vampires sucked blood... not cock.
Friends don't let friends watch American Idol.
I killed Asmodean, let the speculation end.