1. This seems to getting more common, buyers and sellers who don't leave feedback on Audiogon. I will not do repeat business with anyone who doesn't leave feedback, either on Audiogon or ebay. I feel that it's rude.
2. You can't be hearing what you're hearing because there is no scientific explanation for it, i.e. PCs, ICs etc. cannot possibly make a difference in sound or in other words, they all sound the same. There's a lot of stuff that science can't explain. Does that mean it's not happening?
3. The best conductor has to sound better than less efficient conductors. Why?