Before Blacky Schwartz, Norb Mulaney also did a lot of bow performance testing and regularly published the results in several magazines. As I remember, he used something closer to the old AMO standard, about 9 or 10 gpp at a given bow weight. Can't remember if he used 28 or 30 inches of draw.
I started collecting the results that Trad Bowhunter used to publish from Blacky Schwartz' tests. Never did anything with the info and TB quit publishing those tests several years ago. What I do remember is that the performance differences weren't real great when comparing apples to apples. Might have been as much as 15-20 fps when comparing the fastest bow to the slowest, which is a big difference. But when bows of similar design were compared, they seldom varied by more than 5 fps.