Not sure if this is better treated as a new question...
For the sake of being completely explicit, does the article spell out all the reps for each session--two "prep" sets, and an all-out set?
Does the article assume that we're doing warm-up sets, as the OP here seems to indicate? If so, could you spell out your recommendations here, maybe especially for number of warm-up sets?
I'm going in for day 3 today, and I put in a few to a bunch warm up sets for some of the exercises (mostly the bigger ones), and days 1 and 2 took longer than I expected for workouts intended to be "short", so I'm suspecting that I'm adding more warmup than you had in mind, if you were expecting any at all...
I mostly have experience so far with the StrongLifts and Starting Strength programs, and the latter has an app that recommends approximately 5 warmup sets for 3 working sets of squats, for instance.