Chris MacDonald writes on The Business Ethics Blog (his site), that the meaning of authenticity when it comes to advertising seems to be anything but precise. He mentions a book called The Authenticity Hoax, that has a similar argument.
I find MacDonald’s analysis interesting and recommend the entry to your consideration.
I looked up Andrew Potter. The author of The Authenticity Hoax has been called – One of Canada’s hippest, smartest cultural critics. (His book is currently 19.95 on Amazon.) Mr. Potter writes a regular column for Macleans. You can find it here.