I love calf articles, mostly because nobody can agree with what lifting method is best for calves. I agree with the article's perspective on training like a gymnast or sprinter for developing these respective areas.
However, as a guy who was blessed with muscular calves, I have had several lifting partners that were runners that did both heavy weights and also workouts like these. Unfortunately, none of them ever broke 15in. barrier. Due inpart to some very long muscle bellies. Until they met me.
I had them do which ever calf work that was best for them that gave them the best satisfaction, but I had them start abusing their fore legs. What does this mean? It means toe raises for the Tibialis (thank you shin-splints), AND doing exercises for the smaller muscles that invert and evert the sole of the foot.
I know this works cause I was stuck at 15 to 16 range and was running and getting shin-splints, I started doing toe raises and added an inch.
Enter sticking point 2. Then while doing martial arts and noticed some of the guys had freakily developed lower legs from all the kicking, and I started working these muscles and added more size, putting me up to the 18 inch mark and getting my workout partners past their 15 inch plateau.
So, to summarize, work the calves (soleus and gastrocnemius) so you feel good about the work you have done, but make sure you keep the balance and FOCUS on the fronts, sides and internal muscles.