We'll see in a few months time, for me, or sooner on here.
Till then, I choose to trust the guys at FT86Speedfactory, I have found their product reviews reliable and their dyno was on a stock car. I don't see why they would draw the lines themselves when they know for a fact that would backfire on them big time within months.
And one in 10 sounds like a good statistic. That is about the same chance that one out of ten beginners would not hit a false tune on a violin. If that is prowess or just chance is another question.