Great Points Jack, and I think we can mostly agree.
On the other hand, in my opinion, we are comparing apples to oranges here. I don't think any human man can touch a dog in any way shape or form physically or pound for pound.
Furthermore if you look at, lets say the Wolf. Wolves can range in size from 50 to 110 lbs respectively. They can track prey for as far as 75 miles, and then have enough physical strength to take it down and eat it. Whether it be a deer, or with the help of the pack a bison.
No man is capable of that kind of endurance. And in the wild, as a wolf it is an advantage to have some size to you. You never see the small male leading the pack
So have we really tapped into what it really is to be a conditioned athlete as a dog? I don't think so...we have no idea how capable these little (no pun intended) bulldogs really are.
I wonder if it has more to do with the confinement of our little warriors that has all of their potential sort of pent up, or never truly utilized, especially when it comes to the larger (45+) dogs.
S_B