Originally Posted by Douglas_of_Sweden 
Very interesting Mike, thank you. I've never been sticking around much on Canikon forums, except when search for some 3rd party lens link me there. Does this mean that they complain and moan about their cameras even more than Pentax owners does here and elsewhere?
Possibly.
Also possible is that the buyers of brands other than Canon/Nikon were for some reason more likely to come back and fill out an online customer satisfaction survey. That's why I said the data in the graph may be completely meaningless. Interesting to look at, but not exactly scientific or reliable.