Also, meat contains a vast amount of fats and proteins; not mere protein alone. Therefore comparing protein shakes with meat would have to be balanced by adding something like EVOO into the mix to account for the saturated fats in meat.
This is not even accounting for the amino acid profile of have WPI continually as your only protein source. You need a diverse range of aminos...
If you have one group consuming more calories than the other (which will happen when ONLY comparing protein content of meat and WPI without accounting for total caloric intake) then the study is flawed. More calories = more potential for growth..
Eating in excess to gain muscle (think: Bodybuilder) is a given; as you appear to opposing it or doubting it, you find a study that shows that eating in excess is not needed (which it is) to gain muscle mass (not merely developing muscle, but accumulating a large volume of muscle.
You're the one challenging the 'status quo' here, you provide a study that contradicts that status quo .
Read a text book about basic physiology then come back and see if that changes your mind.
While you're at it, find me a study that validates that an Orange is indeed Orange and not blue.
Guy, it's very simple - there's a study proving it, or there's not. And by all this back and forth, it's quickly becoming apparent that there is not a study. (that we know of) Therefore - no one knows the answer to this question. Regardless of how vehement they are.
I'm not going to do research for you. If you are merely going to try undermine everything everyone has said, then we are not going to go out of our way for you.
I guess you'll never know which is better.