That purple max has been around for a while, I used it in 2008. I was growing purple kush in coco/perlite with Cutting Edge brand nutrients and I used the purple max per directions,maybe on the light end of suggested application rate. I used it on half my plants just to kinda see if I could see a difference. Every thing came out looking the same, no additional color or trichome coverage with the purple max plants.
I think that same text has been on the bottle for years, where it talks about the outdoor mendo growers reporting great results and how it is in experimental phase.