Five pounds of muscle in two weeks seems pretty impossible. But most hardcore types care about muscle volume and being lean so as long as they aren't adding fat and the muscles are bigger they would be happy about it right?
I'm tending to agree with Lyle though that as far as diets go it's calories in, calories out for the most part. I happen to feel better when keeping carbs low most of the time, so that's what I've been doing.
I've moved my focus more to exercise and establishing a training discipline, rather than what's the next meal and how many carbs is it.