I was talking with a fellow gamer at work and then had this thought. My warlock has crap luck when it come to drops, I am thinking it may be because this was my main toon to run with that I now carry a lot of exotics on it. This Friday I am going to test the theory out and only equip just 2-3 of each type of weapons and see if I can land the elusive Ghorn. Will update if I can confirm or debunk the theory for those that feel they are in the same boat as I.