The stronglifts advice is for someone with no mobility, whether it be from surgery or from muscular ligament tightness. This is an agressive program to regain movement in a joint which has lost virtually all of it.
Mike Boyles advice is for movement prep, this rep scheme will warm up the muscles and ligaments through their ROM, increase it gradually and help protect from injury. If you are doing this as a warmup follow Boyles advice. If you want a little bit more mobility you can also do it at other times, but for the calves many respond to static stretching, sprints sleds etc, so it really doesnt need a whole lot of att. as long AS it's already functioning