Yeah, he probably made up the 85%, there's a reason that polling and statistics are a science and not something an insider can just guesstimate perfectly accurately, but the fact is that he's probably more right than wrong, and he knows better than most us.
it's undeniable that if you have the cash, it's not too hard to cheat under most AC's at least moderately, and it was much easier in the past. furthermore the punishment has for various reasons sometimes been little more than a slap on the wrist for a fighter's schedule of competition. sure there are probably the odd few that have never taken something they were pretty sure was illegal but im betting most have even if only for a while, in a period where they knew they wouldn't test positive before it flushed.
Everybody good, plenty of slaves for my robot colony?