Research changes daily, I believe you on the research part, but I'll stick with what I found from my own experience, if I eat for example a piece of chicken breast before training, I'm lazy in the gym, and I understand why this happens, because my body is working overtime to digest the chicken so my energy is split between my workout and digestion, every eat a leka steak and just wanted to lay down afterwards? I get the same feeling in the gym, but lets say I grab a peanut butter sammie and banana 30-60minutes before my workout then I'm like a energizer bunny, the proof of the pudding is in the eating