laynlow, I'm not taking anything personal. I'm just have a tendancy to be a smart alec.
As far as trying new things, and finding better ways to do stuff, I agree totally. I addressed that in my post that you quoted from. Experiment and listen with an open mind until you find what works for you and then practice it. I learn new things everytime I go shooting. You need to pay attention to what you are doing, and pay special attention to the people that shoot better than you.
With that said however, there are so many different styles used by some really good shooters that the idea of there being one best way to shoot is tiresome. I file it in the same place as the one best gun.
There are some systems that I try to talk people out of because A. they just plain suck. or B. Nobody on Earth does them well. Just like I would try to talk somebody out of buying a Lorcin (because they just plain suck) but I wouldn't try to talk them out of a Glock or Sig just because I personally don't like those brands. In the same vein I try to get my students to not use the cup and saucer grip, or the grasp the wrist grip, or my personal favorite, the put the support thumb over the firing hand so it can get whacked by the recoiling slide technique. (from personal experience, if you have a student that just cannot help but stick their thumb there, make sure they get a revolver!)
So I put Weaver vs. Iso in the same camp as High grip vs. standard grip or locked thumbs vs. thumbs forward. Those topics are the training equivilent to Glock vs. 1911. Both sides think they are right, and both schools of thought work well for different people.
I know of one major training school that absolutely insists on Weaver as the only true way to shoot. They harp on it constantly. They won't let their shooters go any other way. That is their method. The same thing for everybody. Personally I don't agree, because some folks just plain can't shoot Weaver worth a darn. But according to the particular school, EVERYBODY ELSE IS WRONG. I just think that is a stupid way of thinking.