13 episodes back-to-back is too much, all at once. If you miss it, it's gone. /forums/images/icons/frown.gif
It'd be better if they ran one episode per week (leading off with the A Call to Arms movie, and then continuing in the JMS order), on the same night of the week, in Prime Time (same time each week), and aired a couple of repeats of the episode later on the same day and on a couple of the following days (like USA does with The Dead Zone, and Monk).
That's what you do if you're trying to grow a fan base.