I think a lot of times you can make progress with different systems if you believe it will work and you click with the trainer personality wise. I don't know if Dorian pushes his clients overly hard. In any case it's impossible to make someone train at max intensity if it's not in their personality. It's easy to fake intensity and failure 
I also don't know what he would prescribe to others now but he says if he had to do it again he would train even less frequently and with even less volume, plus he says he learned he should have backed off the pre-contest weight lifting intensity due to the injury risk since it's just about muscle maintenance at that point. Dorian would probably try to convince Samson to drop his doses and who knows if that would work
It's very obvious that the volume system in training works for a lot of bodybuilders
That's an indisputable fact.
Not to say Dorians training method doesn't work ( I've a lot of time for most of what Dorian
Has to say & his exercise form was impeccable.)
The HIT v Volume debate will not be settled as both produce results for different bodybuilders.
Mike Mentzer said the same about training less frequently with even less sets.
🤷🏻♂️
