I have just been reading an article, 'The Assassination of Cordelia Chase' and the author states matter of factly that when Barney was killed by Cordelia using that demon horn, that she took his powers. I remember a few years ago formulating this theory, as Cordelia does seem to become more attuned to the feelings of others after this event... so my real question is whether this was ever confirmed as definite. To my knowledge it is not in the show, but outside the show, ie. by Joss/writers, is it confirmed? Or is this just another article bending the truth for it's own devices?