How many times a week do you work out?
I met a body builder who would spend 3 hours a week in the gym. He went just 3 times a week and was just fuckin huge. His philosophy was that if you go and do say chest and tri's, and for the next 3 or 4 days you were sore, than you need not go to the gym. If your body is sore it means that you have succeeded in the workout and torn muscle tissue. Now why would you go say 2 days after and train something else when your body is concentrating on repairing the chest and tri's still?
I know everybody is completely different and no two people can achieve the same progress under the exact circumstances.