not really, I'v not done a with/without test, just not practical,... I know it's used by "other gardeners" for the same purpose, it is a plant hormone after all... but I'm not 100% positive on the effect on terps and such... it's just from bit and pieces of info gleaned from various products like BF-X and the content of their ingredients... I have used BF-X before, and it does for sure work IMO,...
2 years of doing it, crushing up a 84mg kids aspirin into about 1/2gal water for drench, and I'll tinker with a foliar spray + fulvic to see what it does,... no bad effects, resins/terps have been on point or better cultivar to cultivar that I've seen,...anectdotal yes, but I see enough to stick with it!