I can agree with all of that. Each and every dogman have their own threshold that they cross when it comes to testing their dogs. It can vary in many ways and we don't have to agree on how to do it either. I tend to fall somewhere in the middle between you and Jack when checking one out. It's never cut and dry.
I've been around some that like to test their dogs when they are out of shape and overweight. I've seen some that like to test their dogs when it is super hot. Some put them both together (overweight and hot) at the same time. I disagree with all of that and would never do it that way. It is my opinion that it is the lazy way and doesn't really give a good insight to true gameness and many times falls into the "Hardcore" mentallity. I like to see them make their decision for other reasons.
I've been around people that really never found what they were looking for too. They go through dog after dog and never seem to ever have anything to show for it.