There is good testing, and bad testing. I suppose it would be possible that Wilson does as extensive of blind testing as Harman, but this has never been borne out by either photo tours of their factory done in several magazines and websites, nor by the actual quality of their speakers.
Harman's blind testing of speakers is very special, and unique to the speaker industry --- no one else does it as well or as rigorously, and what they do is pretty much incomparable. Have you been to Sean Olive's blog to see what they actually do?
--Andre
What about Paradigm? They have an anechoic chamber and they do double-blind testing iirc.