I'm not at all surprised that the GM executives are too tightly wrapped up in their cocoons to drive their own products (with the exception of heavily tweaked versions). Given their inability to recognise the shift in the auto industry over the last 30 years, it's obvious they aren't in touch with reality.
I think the article has a good message for developers, especially that the old rule of 'Eat your own dog food' is of utmost importance. If you don't use your product, how can you know what your customers experience is like?