He is not the first that made that comment so I was just verbalizing what I think every time I read or hear that. They are making an extrapolation from a fact. It is certainly a fact that decoding a FLAC increases processor overhead. (Fact) Therefore, decoded FLAC will sound worse than Raw WAV (extrapolation). They also assume that there is no cost to using a bigger file, but that will be dependent on where it is stored as well as Bus speed. No free lunches, just lunches that are assumed free. I do not assume that would produce any audible problem unless the file was absolutely huge and the bus speed was ludicrously slow.