Now that's a lot of GOODS mate

But I'd agree with your premise especially since IGF assays are the best indirect means of evaluating the quality of GH. The other more direct means of testing GH (LC/MS) is not only expensive, but is a more complex process than most can begin to realize. (Mands is one exception and I KNOW of for sure

)
Of course the other HUGE problem MANDS eluded to and IW mentioned, the batch to batch varabiity of generic GH is so hit and miss, one can never be sure if the quality will remain the same from literally, one vial to the next.
Although MANDS and myself have both proven the quality of generic GH has improved considerably over the past few years, the batch to batch disparity remains such a significant problem, I would only recommend the use of Pharm grade GH AT PRESENT.