You guys have to overlook the craziness of all of this and look at some key factors here:
1. We ALL train to get stronger, and strength ALWAYS leads to size whether it be over 20 sets or just the one.
2. We all have to recover, and recovery will be 50% of your progress, otherwise you could train 24/7 with a perfect diet/supplement schedule and just keep progressing.
3. Stress is cumulative, and the more you workout, the harder it is to induce a homeostasis disruption. What used to take one workout will now take 6 to see some real progress (strength going up 5-10 pounds).
This varies across all sorts of individual factors, but generally, I believe Mike Mentzer stumbled upon what DC trainers call cruising, but he never 'blasted' again per his writings.
Everyone 'blasts' and 'cruises', or more precisely loads and deloads.
So, if you can keep squeezing out rep gains that lead to weight increases on a lift and eat to support the weight gains, voila you will have a big dude eventually.
Or you can go from one Flex workout to the other hoping some magical combination of things will over ride the underlying training problems. I am not trying to preach here at all, but in reality you guys have to understand and accept the way this stuff works in order to keep progressing.
Doggcrapp training works out the kinks in written form for you, and using some common sense will let you sort of make minor adjustments to suit you individually. The same applys with HVT, 5X5, 5-3-1, etc. You do have to do it as written to figure that stuff out, but hey, it is worth it to spend a month and really learn something about training yourself instead of wasting all of this time doing bullshit.
But seriously, look at the above concepts and look at any program template and see where they all follow these basic guidelines.
HD, as a complete 'system' is missing the spoon feeding of these concepts, however it does press on several invaluable concepts that the audience reading it had never considered it before.