I've seen so many shilling threads for greytops lately Sero, directed at the credulous masses, that I'm getting pretty tired of it. The marketing strategy for these different brands of hyped-up generics follows a well trodden path, and bodybuilders are prone to falling for it. Next year it'll be pinktops or whatever.
One of my close friends promotes greytops on boards - he sounds very persuative and convincing. He gets a nice free supply for doing so, but it's no different to (most) other generics, as I've found myself. It doesn't compare to genuine pharma in any way, which really is noticeable even on low doses.