The 30% number you cite could be true but perhaps in order for Chinese (or any other country) manufacturing to be economical perhaps it needs to be 60%. Mexico is actually important here.
Still, in my eyes that only makes it more intriguing how they bridge the cultural differences, since whatever they are doing seems to be working.
I was just quoting what the documentary said. There was so much contention between the management and the workers in the American glass factory featured in the documentary. In the end, the management hosted a competition between the American workers and the Chinese workers. Chinese workers won with a big margin.
Showing that the Chinese workers won by a big margin doesn't prove anything. It definitely doesn't prove anything outside of that specific scenario.
What metrics is this based on?
I'm pretty sure every country says that about themselves. It's more a statement of national pride than of fact.