The review below this one is worthwhile, but I would suggest that the author misses the joke. What he takes as condescension is a condescension that includes the readers within the circle of initiates. It doesn't scoff at the reader. Thus, it is meant to help English majors think that they are a sort of blessed priesthood who have been initiated into the secrets of the fellowship. (When I was in grad school, that's what I thought we were.) Of course, this is all somewhat tongue in cheek and meant to be witty.
About twelve years ago I had the pleasure of hearing Brooks, then quite elderly (I don't know if he is still alive), present a paper at a conference. I remember him as slim, polite, self-effacing--the essence of the Southern gentleman at his best.