Shogun is one of the few stocky fighters that make this far in MMA, since weight classes & the advantages of being tall and long limit the proficiency of stocky people in the sport. What this stockiness affords Shogun is a type of power that's absolutely physiological and a lifetime of tactical practice countering over the top. So yes, it's Power and Timing. Look at how wide his shoulders, back, and hips are & how big his legs are. Those all generate power. No pectoral muscles, which is a muscle group that inhibits power. If he had better boxing technique he'd be one of the pound for pound hardest hitters in the sport.