I have had excellent results with this method but I do tweak with additional music when I feel it necessary. Generally, I find that a system setup with this method and the one recording get you 95-98% of the way there. I also use a RTA app on my phone to help, primarily my sub woofer settings, but it does indicate other potential problem areas. I also love to double check my positioning by playing Roger Waters 'Amused To Death', recorded in Q Sound. For those unfamiliar with Q Sound recordings they can create a surround sound experience with 2 speakers, but only when the listener is equidistant to both, a really well recorded album and if you haven't experienced it it is a bit of a mind blower.
Not trying to be argumentative Doc, but have you heard systems that you thought were really well setup by ear? We're sort of dancing around the measurement vs listening debate here. I certainly believe that a well engineered product is likely to sound best but many manufactures, I assume you as well, will do subjective evaluations of various parts, and the various prototypes. After all its my ears that determine if the system is singing.
That all being said, I will do some research regarding test gear for setups, I seem to recall a section of the website where that info might be.
Also, I haven't said it before, but I am "Professionally Impressed", an old girl friend used to call me Professionally Unimpressed LOL, with what you guys do. Especially your 'How To' videos and I have gotten a wealth of knowledge from Bottlehead and the forum members. Thank you all!
