Well, I know that the point of the article is not "Does Paul Graham Read Hacker News?" The point is more "Content is worth money," though it's argued badly.

But, if you want to know if PG reads Hacker News. Yes, he's a heavy reader and contributor:

http://news.ycombinator.com/threads?id=pg

http://news.ycombinator.com/submitted?id=pg

He would have to be of course, since he is a moderator.