Overhead, I'll post my answer to your pm here. First, no carbs are not a requirement for muscle growth. Many more primative cultures, as well as generations of our ancestors, ate/eat very low carb or zero carb diets. Their muscle did grow after being weened off of their mothers milk. Thus muscle growth does not require carbs in human beings. Kaz is a perfect example of someone who got massive on low carbs.
Dave Polumbo, aka the anabolic freak is hardly small. He is considered to be pretty massive even compaired to other guys who compete in the super-heavy weight class inthe NPC on stage with him. Have you ever looked at his bulking diet? High protien, moderate fat, low carb. Once every 7-10 days he eats a meal with about 300 grams of carbs in it to keep his glycogen stores full. High protien intake can do this to a certian extent, because amino acids are easly converted into glycogen, however alittle carb boost every now and then will create a more ideal anabolic environment. Oh, btw due to his fairly lean bodyfat year round, Dave diets for 5 weeks to prep for a show... and he gets a cheat meal every day at mcdonalds to keep him from loosing too much weight, since he only needs to drop a couple ibs a week.
Dr Mario DiPasqual (I might have mispelled that), a medical doctor and former olympic powerlifter has written alot on year-round low carb diets for both competetive bodybuilders and powerlifters. He advocates using a modified ckd for bulking in which you miniumize insulin levels most of the time to limit fat gain (you only need small amount of insulin to increase protien sythesis), and maxiumize circulating levels of hgh and a number growth factors by keeping blood sugar levels in check, then using a carb loading phase each weak to overfill one's glycogen stores, via the supercompensation effect. This is very much like the carb depleting and loading that bodybuilders use just before a show. This supercompensation effect creates an extremely anabolic state. BTW, this is also the sort of diet plan I use. Hope that helps answer your question bro.