I didn't use whey protein for a long time. IMO it's just an easy way to get extra protein. If you eat real food and get it from that instead, just as good. There's nothing special about whey.
I agree with the spirit of what you are saying as you can tell from what I posted above. But whey, like casein or any other protein, has certain unique properties. As I've already covered, undenatured whey raises glutathione. And here are another couple of teasers:http://jn.nutrition.org/content/134/6/1454.short
" High-Whey-Protein Diet Reduces Body Weight Gain and Alters Insulin Sensitivity Relative to Red Meat in Wistar Rats"
"Dietary WPC also reduced plasma insulin concentration by 40%
(P < 0.05) and increased insulin sensitivity, compared to RM (P < 0.05). These findings support the conclusions that a high-protein diet reduces energy intake and adiposity and that whey protein is more effective than red meat
in reducing body weight gain and increasing insulin sensitivity."http://ajcn.nutrition.org/content/75/6/1051.short
"Whey protein rich in α-lactalbumin increases the ratio of plasma tryptophan to the sum of the other large neutral amino acids and improves cognitive performance in stress-vulnerable subjects"
"Because an increase in the plasma Trp-LNAA ratio is considered to be an indirect indication of increased brain serotonin function, the results suggest that dietary protein rich in α-lactalbumin improves cognitive performance in stress-vulnerable subjects
via increased brain tryptophan and serotonin activities."
Now I know what some of you may say: this doesn't have anything to do directly with hypertrophy. Well, first of all, it DOES over the long term. Whey helps with insulin, immune response, detoxification and likely certain aspects. This is going to keep you training for the long haul and, if you really want to put on muscle, that is what counts.
But here is another point: the cheap wheys (that are neurotoxic) are absorbed very quickly. So they are idea for pre and post workout drinks, forgetting about your poor hypothalamus and brain, if you have a somewhat porous blood brain barrier due to PDE5 Inhibitors, fevers, ministrokes, etc.