Of the popular REQ systems, I tend to have a little more faith in Audyssey because of the resources/depth they have and the fact that reputable manufacturers such as NAD, Denon, Onkyo, Marantz use their products. Any of them could have the resource to develope their own if they choose to. Having said that, aside from managing my subwoofers, Audyssey does not alter much else in my HT room but I think if the room does not need EQ to begin with then a good REQ system should leave it alone anyway. Other systems such as Anthem's, may be just as good or better but unless and until I see some full technical reviews supported with all necessary measurements/data, any so called rave reviews are mostly subjective and speculative. I do have faith in all of them in terms of bass management though as that does not require rocket scientists to figure out. Of course, I am also just expressing my own subjective opinion.
Guys like ADTG may find Audyssey useless because they have rooms that don't need EQ to begin with, and they have subs that have auto EQ built-in, or have enough controls for them to be dial in for the 15 to 80 Hz range.