As with any class
IT's The INSTRUCTOR
Not the AGENCY
I agree to a point. It is primarily the instructor, but the agency does have something to do with it, as really, unless the instructor is planning on going outside agency standards and guidelines, there are limitations in what can be taught with any agency. I've taken tech courses through TDI and GUE and each has its benefits and limits. I do not disagree that the instructor is a big factor, but selecting a good tech course based on one metric alone is limiting.