In the latest Stereophile, John Atkinson briefly reports on a presentation from the most recent AES Convention in October of this year; a meta-analysis of blind-testing studies which suggests that even under those conditions (i.e. blind testing) listeners can reliably distinguish hi-res digital recordings from CD quality recordings. I don't have the abstract to read, and I don't know when or if this analysis will actually be published; nevertheless, I think it deserves mention in this forum.