DC has repeatedly stated that the 2x bw protein is essential if you can manage it. If anyone is capable of doing it and is not, they really are not making gains like they could be.
Eating huge is a crucial element of this program!! Gains will not be maximized if elements are overlooked.
The program is intense and causes extreme breakdown of the muscles. Two grams of protein per bodyweight is enough to repair the damage muscle tissue and stimulate new growth.