I just found this old promo about the early Nicktoons. I don't remember seeing it before (this would have aired just before if not at the time I had gotten cable).
It provides a funny "take THAT" at USA's Cartoon Express. I had forgotten about that (how many people remember Cartoon Express?), though I did watch it a fair bit when I got cable (yeah, I keep saying that when I got cable I practically watched Nick all the time, yet somehow found time to watch Cartoon Express....).
It also feels weird to see Cartoon Express viewed as competition for the Nicktoons. Obviously, the Nicktoons have had longer-lasting success.