AAP is right about DC. More than half the time you read a post with someone claiming to do his workouts, they aren't doing anything close to it. I admit I was guilty of this once. About two years ago, when the cycle for pennies thread first popped up on Animals board, I gave it a go. I didn't gain anything. No size increase, nothing.
After getting strep throat, and then the flu, AND then upper respitory infection all one after another (as soon as I got better from the one, within 2 days I was sick with the other!). I went from a hard 275 down to a frail and tiny 222lbs all within 2 months. I was depressed, but instead decided to use my time away as a chance to read up on all various training methods. I ended up back on Animal's board, reading cycle for pennies again. This time I took notes, I read each page (and there's a lot of pages!) over and over again. When I returned to the gym I went from 222lbs to 252 in 2 weeks. It's been 4 weeks back, and I'm almost back to where I was, with lower bodyfat, and harder than ever.
I guess my point is, that if you want to do something like DC, you have to really make sure you have it all down. You have to also make sure you can handle what you need to do to make it work. If you can't eat all the protein, or handle the pain of the forced reps, the slow negatives, the static holds, and then go to the extreme stretches, etc... if you can't do all of it, then don't bother.
I think what AAP is trying to say is, that people just can't expect to do little to no work, or even lot's of work with a just going through the motions attitude. You have to rip it up while you are in the gym. You have to destroy and own the weights, and your body. It's all about hard work, it doesn't matter if you are doing DC, HST, an Arnold routine, something you came up with, etc, etc.. you have to be willing to go that extra step, or forget it.