What I said was more people do split routines than full body workouts. lets say there are a million people that workout for example, (obviously there are more people than that, that workout). lets say 80% do split routines, okay so 800,000 people, and the rest 20% 200,000 do full body workouts.
What I'm saying is that because there are 800,000 people who do splits compared to 200,000 who do full bodys , there is four times the pool of people to draw from in the split group. that's what I'm saying, just because there are more people that do split routines doesn't mean on an average percent of the group that they have bigger arms than the average of full body routine people.