in fact, many personal trainers believes in that, they just see that there is no needing for such a very high amount of Protein during the off-season including Nasser-El-Sonbaty he don't consume much protein during the off-season according to his official web-site
they all just say consume as much carbohydrates as you can and moderate-high amount of Protein with little fats and you're going to be great, and I agree with them
3grams/pound carbs, 1gram/pound of protein is enough for bulking