It’s all relative. The point isn’t if someone can get exactly that big in 12 weeks, the point is that drastic gains and improvements can be made in a relatively short amount of time and that different bodies are capable of making different changes at different speeds. The people in that film had amazing body transformations in a mere 12 weeks. Well 12 weeks isn’t much time relatively. And if they can make those changes in 12 weeks imagine what can be done in 6 months or a year.
No one is saying Max went from a skinny little fella to that in 12 weeks are they? I personally stood right next to Max multiple times in the last year and he has been a fairly stocky and muscular guy during all of that time. What I see In that picture is not drastically different from last summer. He does appear quite a bit bigger than 2 summers ago however but are you saying he couldn’t do that in two years?
You would be surprised what can be done in a relatively short amount of time if someone really puts in the effort.