Some guy did a presentation to a load of sound engineers and producers a few years back testing peoples opinions on differences in sound.
He had a speaker and which had a switch on which did absolutely fuck all. he played a song through the speaker with the switch up then again with the switch down. He told them it changed something to do with the signal and then everyone was saying all the differences in the sound they heard.
He then told them there was absolutely no difference and it was all in their head.
My point is you hear what you want to hear. Obviously to a certain extent there is a big difference between somethings i.e. 128kbs mp3 and a WAV but, a lot of the time people are chatting shit about the big difference in quality of things.
That is worrying. Sound engineers should know better if they are getting paid top dollar. I guess its down to opinion and experience then... Which ultimately means its anyone's game - The arguement will continue forever