I dont agree with this, and alot of my studies in classes wouldn't either. I used to eat a ton of protein as well, and I can believe Im saying this but thats too much. I dont believe in the RDA because thats bull shit, eating like 40 g of protein a day is wasting away for someone after hypertrophy. Shoot for .7-1g of protein per pound in my opinion... I have experienced on this with me and with many of my clients and it works great every time. Many protein products are acidic, I never knew when I was eating 5-8 oz of meat per meal, but it was causing a huge imbalance in my PH. Now I balance out about 4 oz of lean fish or meat with 3x the veggies(usually spinach or broccoli). There are foods that are alkaline and foods that are acidic, acidity is somewhat necessary, but when you are more alkaline your body puts muscle on faster because its in a more harmonious and healthier state, as compared to 300 g of protein diet and the high acidity. Now that I PH balance, my body can put on muscle or maintain what Im at more of an ease. So dont go over board with the protein...
And dont get all your protein from a drink, thats not quality as compared to leaner meats and solid meals. If your on here, your obviously looking for answers to help you achieve your goals. Protein shakes are not going to get you to your goal as compared to efficiently timed solid meals with the right macronutrient and micronutrient profiles. Dont half ass this!