You know if I breakdown my real bulking diet, which is a lot of rice/bread etc, with lots of protein from lean meat, fish and shakes, its probably 50-30-20 (carbs-pro-fat). I might benefit from more pro and might benifit from more fat, but its worked pretty well for me so far. When doing cardio with weights you need to pack in more carbs.
Remember its ratios so you could eat more pro without reducing the amount of carbs you eat, and still affect the ratio, which confuses things even more!