Hmmm I was 6'0" 142 first day in the military... After 19 weeks of abuse, (infantry school + airborne) often active 20 hours per day I emerged 165. So 23 lbs of almost lean muscle in under 5 months. I would rate the previous commenter's claim as plausible.
I suppose I don't. But it makes less sense to me that I would increase bone density in 19 weeks in a meaningful amount and even less sense that I would put on any fat when we had roughly 2-5 mins to eat every meal.
