Yes, they have actually. I do believe that Technics had to remove cert from a receiver back in the day because shipped units weren't meeting specs.

And while THX may not have someone onsite, as far as I know, you can't get a unit certified unless you have a comprehensive QA process in place for the unit.

But hey, if you don't believe the enterprise delivers on their intended goals of making it possible for everyone to experience in their homes or theaters what the creators of the film intended by matching as closely as possible the performance of the end user systems (either home or theater) with that which the film creators experienced in the studio, then you certainly don't have to buy their products.

I, on the other hand, have seen where it does work and do believe that it is a worthwhile enterprise and will continue to favor THX certified products where I think it makes sense.

Of course, I cannot say that I am a die-hard, blue in the face, backer of the program as I did just order an Outlaw 990 preamp a few days ago...which we all know is NOT a THX certified product.

All things being equal, however, I would buy a THX product over a non-THX product every time...of course as well know, things are almost never equal.