There is, like you say, many variables but nevertheless very interesting with such a test.
Both GRIMM and Revel ( both winners in this comparisons, part 1 and II. ) has :
1. Excelent directivity.
2. Low distortion
3. A straight, smooth frequency response, with no stereo-system compensation.
Its very tempting to say that Toole and Kevin Voecks is right in what makes a loudspeaker sound good and natural.
That, in turn, would mean that some other loudspeaker experts around the world, is wrong about certain things.
Maybe the need for stereo-system compensation is just a myth, and maybe even a salespoint?