Ah yes I hadn't considered his age, he is very young isn't he, so yes his test and GH levels are likely to be high. His insulin responses will be good (if he's been lucky enough to have the genetics to give him a bias towards it). So very good point Cowort, although I'm not an expert, I know more than most (I'd bloody hope so!
).
However, in spite of this it is also down to some serious good nutritional knowledge and good training.
B1cep - you're at your prime and ready for plenty of growth, so monopolise it, don't leave it till your late 20s like I did! Although I have a lot of knowledge now, I just wish I could turn back the clock and push myself as I do now - I'd be in a heck of a shape now! However, I will say one, thing, read. A lot. Don't take 1 opinion, don't read 1 book. Read 100s, and do some basic science understanding of how chemcials/hormones/elements interact with one another in your body, and in life in general. With that, and the training knowledge of the 1000s of people out there, you can truly make up some good gains and understanding of this game.
I don't mean that just at you B1cep, I mean that to everyone reading and interested and in their early 20s who are keen. Don't bother with magazines like Flex etc... read real journals from experts with knowledge ofg biology and chemistry - then read about how the body works and how muscles are built, read about nutrition, and then put it all together and take the advice from the "experts" on how to train to help you with your own knowledge.
Genetics play a small part for the majority of the population. It's a bell curve, and the mean distribution of people fall well in the middle of it. You do get the exceptions to rules, as you do in all walks of life.
Going back to that chap, he's young, and if he's had some good training coaching and nutrition coaching then it might be feasible, however we don't know how many lbs of muscle he's gained. And he states he has used "help". He would not have got there without it, in 2 years it looks like he's gained well in excess of 20lbs of lean hard mass - to get to his shape, the majority of the population would be hard pushed to get there. If you've got the bulk like some of us here then cutting down to that shape would take a while but yes it is achievable, but that's after several long hard years of development.
My eyes.
I need to do more reading up. Most of what ive taken in is from this thread and the BB sticky. Lots of info but more is better of course. 
)
