Ya know what. It wasn't about admitting that someone made a mistake. It was about something a reader found to be incongruant between the authors and he asked about it--simple as that. For that, you told him to get a life. I just don't think it was wrong of him to bring it up and get the apropriate response from CW. Which he did.
For the record, I don't care about Xen's response. Everyone came to the rescue when that was not the necessary reaction. In your own words it was incorrectly called something by an author. In his own words, CW said people who use that terminology are suspect.
It was a solid question, politely and professionally responded to by the apropriate person.