Another HUGe misconception is that the SA method was ever meant to be the sole part of your routine. Please don't insult us by implying that those of us who studied the SA method didn't work every bit as hard on our musicality or that you are somehow doing something special in doing so. The SA method, as is the case of ANY OTHER method is a means to an end - a mean of making the mechanics of trumpet playing second nature so you can concentrate on the music in other contexts.
Furthermore, if ALL you do is the SA methods I, II, (and sometimes III and IV), you WILL fail. There is much more to the method than that.
That said, I agree 100% the the CG is not the be all and end all of trumpet pedagogy. It is up to each and every one of us as perpetual students to determine what works for us when.