I personally think all dogs should be judged by that spectrum. I've seen dogs of all breeds become completely dog intolerant once they hit maturity (about the 3 year mark) so I think it's a healthy exercise to constantly check in, see where your dog lies today, but not hold it to that same standard tomorrow. I know a few cold pit bulls and they are... *cold*. Of course, those specimens are about as frequent as cold dogs of any breed... pretty rare. Seriously, imagine any dog and they do eventually have a breaking point (heck, as a human I think my breaking point is much lower than most dogs).
Elegy, I totally know what you're saying. Personally, though, I think it's refreshing to not try and segregate our dogs more than the general public already has. It's not a matter of being naive enough to say that we should no longer pay attention to what our dogs are telling us. Rather, I see it as a jumping board to educate others about their dogs.
For instance, any good trainer of any breed of dog will tell you that it's key to keep your dog socialized. Now, the average Joe Schmoe thinks that means take it to the dog park. We all know the dog park is a bad idea for a heck of a lot of dogs. It also works for some dogs. The problem is when owners never learn to read their dogs and are able to tell if their dog is having a good time, if they're overly amped, or if they're stressed. "But the tail is wagging so that's good, right?"... you know you've heard that before.
At first the rhetoric got me but then I realized, "You know what? Why do I have to be the only one responsible for my dog?"