Here's a shocker...most, if not all, very massive men do half to 3/4 reps in workouts. Or only do middle range (never full contraction or full extension) reps.
Have never seen, or heard, of any top man do strict by the book reps. . They keep the reps at a fast pace, higher reps and medium weight. I'm sure there are guys who do stricter reps....their choice. Never go by the video's, books and magazines as to how a top guy really trains.....most of it is BS.