There is an issue with that statement:
The people with the best physiques on the planet, also take the largest doses of GH, slin and steroids, as well as other drugs. Thus, when you take all those considerations into play, its really hard to determine if the way they are training is optimal, since they are on a LARGE amount of drugs.
In order to find out the optimum training routine, you need to keep as many factors as constant as possible, then see what routine works the best. When you have people taking drugs to enhance their physique, you cannot say that the way they train is the best, because many of them are on similar drug cycles. The way they train is optimal for them because they are on drugs. That same routine may not work at all for natural people or people on much smaller doses. You can't take the select few people with the best physiques in the world and say, "and odd how the best fucking physiques on the planet train very similar."
The split is what took most bb'ers to the next level as they were all doing training everything twice a week. Natty's make even better progress as they don't recover as well. It's even more significant for them.
So nowhere am I taking a few examples, talking from a very long time having done this. But surely some get better results doing something different, but from what I've seen, the split is king. Some body parts can get a second spankin' but it has to be strategic, not just "training to train"... I mean if you do arms twice a week, back and chest may be affected. YOu could do bieceps with back but after back, no way am I ready to train them.
So, like all we do here, it's a pick your poison situation. No split allows you to focus and prioritize everything, I've spend countless hours with a piece of paper trying to get in each body part every x amount of days, but overlap is always a problem or having to go too many days in a row.
So.. It comes down to what I'm saying here, most make progress when I help them with similar ideas to what I do and is why I am big on them. To help others out as most are just spinning their wheels... If a guy 6 foot tall cannot fill out an xl shirt and be lean after a lot of years in the gym..
FAIL!!!