The fact that the essay is mostly about the other ideas and titled as such does not discount the fact that the argument therein that most people dislike Arrington simply because he is curt is flawed.

pg cites his own curt/succint approach to writing as a reason people dislike him and speculates that people dislike Arrington for the same reason, thus using Arrington as an example for part of his argument. While pg's central thesis in the essay stands, the Arrington example does not.