The bad luck protection in Diablo 3 lasted for about a month (from RoS release) before the drop rates were buffed to the point where the protection never has a chance to kick in.
I really hope you aren't one of the guys who tested the "Junger Method," because that was never a real thing.
I'm only posting this because of your "tried and tested by me" comment. In my experience, every single "I tested this loot theory" post, regarding Diablo 3 drop rates, was wrong.