Given that Disney Closed-Eyed Grin was only just launched yesterday, and that it's still only a digital tier upgrade channel which people have to pay an additional fee on top of their standard cable/satellite fee in order to receive it, coupled with the fact that Closed-Eyed Grin is presently just recycled Jetix lightly sprinkled with a few new shows, most of which are only starting out (Jimmy Two-Shoes, Kid VS Kat, Aaron Stone), are just burning through their remaining episodes (Yin Yang Yo!) or are just re-aired canceled show reruns (Static Shock) its' not placing a dent into CN is a no-brainer.
XD may become a contender someday, after it grows a little and finds its' legs, but it'll still have a long way to go before it reaches CN's place in the running, let alone surpasses it.