I knew it would happen soon. Kannagi has just passed Toradora as the most posted-about new show (i.e., not a new season of an old show) on 2channel. It's approximately 200 posts ahead: just into its 32nd thread while Toradora's just ending its 31st (i.e., about 31,100 posts to 30,900).
Toradora had its 4th episode last Wednesday, Kannagi's just aired less than twelve hours ago. Toradora was several threads ahead early in the season, but Kannagi has been catching up. Here is my
blog post giving 2channel popularity of fall season shows as of several days ago.