Im with Limba on this one. KS is making claims based upon his own assumptions, he isnt giving any real proof or evidence to support his position. I can say that I think 90 percent of fighters do anything from punching cats to sleeping in trees, it doesnt mean anything without facts or statistics to back it up. Im sure that the use of PED's is pretty wide spread in most pro sports, mma included, but that doesnt mean that some number I pull out of my ass means anything. Maybe he trains at a place where most of the guys use them. Maybe there are some gyms where almost nobody uses. Its impossible to tell how accurate guesses like this are without any actual facts.