Unbelievable

Unimportant as it is, but I do suspect that these Yamaha speakers from the OP actually sound quite good. I have no knowledge, but think they might be charging money for something.

Now, is paint contributing to it or not, I have even less of an idea but I would cut them some slack.

I fail to see why paint can't affect sound but backward wires and magic mats in the mains panel box can. 

Correction: Movie -  Breaking Away (not the breakaway) "Sabatoge Italian Style"                    I forgot to take my ginkgo biloba today.

@djones512
Paint can affect sound in various ways but not S/N ratio.

Those who can swallow this kind of nonsense from Yamaha marketing people can go and buy  Machina Dynamica's Teleportation Tweak, it ranks the same :)
http://www.machinadynamica.com/machina60.htm