Wait, wait. It really is special. You see, most of the year, you get recycled talks that you've heard over and over. Last I knew, there were fewer than 150 in the series, so that means that if you've been a JW for more than 3 years, you've probably heard them all (or heard certain ones multiple times). If you were a JW for almost 30 years, like I was, then you've practically got them all memorized.
But once a year, they actually break down and write a new talk, which is presented as a "Special Talk" and added to the series so that it, too, can be given over and over again. After all, hearing it repeatedly will help you to be fully indoctrinated grasp the material better. Meanwhile, besides the repeated public talks, they study the same books over and over again in the Book Study, and have been rehashing pretty much the same material from the same few publications in the Ministry School for, like, 50 years now.
Now, I can go to most any church in Christendom, and the clergyman will have written a fresh sermon for that week, on whatever week I go there. But the Society sees fit to bash the churches because they lack the "abundance of spiritual food" available in "Jehovah's organization". How's that again?