Though I agree to some extent that a more practical and real-life test was available, you must understand that John Brawley is a professional cinematographer and is probably likely also a very busy man. He may well have shot something more impressive with the camera that get has not uploaded yet due to being busy.
Quite honestly, I think that it's fine to voice your concerns at the lack of sample footage available but remember that most people interested in this camera are professional (hopefully) and whining about stuff like this shows a real lack of professionalism. So, take a step back, Thank him for the examples, and wait for newer footage to emerge. Why is everyone in such a rush all the time?