thats because he's got a decade of massive amounts of hormones under his belt. in fact, considering he's gone down that road, he looks pretty shitty.
he could train completely naturally and get to a massive size thanks to muscle memory.
Come on, for 3 weeks you don't expect him to look 250Ibs 3% bf, do you? It's all relative I guess, if you compare him to average gym rats, he looks better then 95% of them.
Let's say he had been working out a little, not just the 3 weeks he claims, or if he's on the juice, the short amount of time he's progressing, in 2 months he will be massive. In those 2 months he will look better then 99% of people who have been lifting all their life!