this is a good thread although first part older but still good to reread what works but Ive tried to gain muscle or just any kind of weight by upping cals . it didn't work to way I thought I have super fast metabolism just got slightly puffy and some water weight. point is over the past few months went back to my normal ways eating clean I added certain meals but besides that also added protein shakes 2 of them I like to blend them with half a cup of icecream some milk I got really good gains . I ran out of protein and seemed gains have slowed . there really has to be something to the shakes added and this made me realize it.
Mabey the leuicine in whey and an improved amino profile by mixing protein sources. I don't know, just guessing, mabey you just needed more protein, who knows. If it works for you it works. Never tried it myself, mabey I should.