Now who the heck said that? I don't see where I mentioned any such thing. If you are referring to the title of the thread, then you might want to know that its just a phrase put together to attract attention and not meant to be interpreted in a serious manner. Didn't intend to tickle your audiophile sensibilities.
In any case, I guess there is one indirect relation between weight and sound. Lets suppose these were made of plastic. It would reduce the weight by a significant amount, but would they still sound the same?
The reason I mentioned the size and weight is because I think these are way larger than they really need to be and that's an inconvenience for me. I guess too much empty place even in the satellites. There might a perfectly valid reason for that from an acoustics perspective. Its also ironic that I started out looking for compact speakers and ended up getting these 25Kg behemoths.