It does not seem possible, or at least not probable, that the average user will muscle in the amount of 12 in 3 weeks. This claim seems to be a bit exaggerated. However, the program does seem to deliver plenty of rapid growth in the muscle area. It provides resources and methords that could really show results in a short amount of time, if followed closely. The calorie depletion and overload, of course, will need to be coupled with plenty of weight lifting and strength building workout programs. You will want to leave plenty of room in your schedule for working out when you use this program.