these things always make me laugh, growth can be achieved many ways.. if you always train heavy you will soon slow the growth as your body adapts.. training in the 6-8 rep range will allow growth for a while, but after you hit a plateau you can train lighter for a month in the 20 rep range and make big improvements in growth.. your body is smart and it will adapt to anything you throw at it... the trick is changing it up and giving it a new stiumulis, that is why dc training works good for so many it is always changing, its not anything special it is just planned out in the future and not just walk in the gym and see how you feel...
Chadd Nicholes has said he is completly changing up the way ronnie trains this year due to his injurys, and I will bet you money he will show up with more growth and lookin better than last year... he should have been doing this all along imo to avoind the overload neccesary for his body to grow with his style of training.. any one that always trains the same way with the same rep scheme,# of exersizes, hit training, blood volume training is cutting themselves short of possible growth!
I think some one had a thread about them increasing their reps to 20 on here recently and others tried it and had great results in the end...
that is why training under someone elses guidence that understands this is always a good thing(phil,dc, and others), they can see the lack of progress and change things up and you continually grow! it really is simple!