So what you're saying is it was common practice for auto makers to knowingly pump extra air into the exhaust to lower the bad emissions in the total volume of exhaust? So I guess the difference is the VW trick turns off when it's not being tested?
The air injection system (on a 60 at least) sends exhaust collected from the air rail out to the exhaust in front of the cat to cool off the cat if it heats up too much. The "air pump" on a 60 pumps exhaust gas, not regular air.