That article is made up of half-truths.
Toon Disney was never a commercial failure, it's just reached the end of its shelf life. Jetix was originally intended to be its successor, but instead the channel will now be called Disney XD, perhaps to capitalise on XB's multimedia nature.
As for PR gearing up for an older audience, possibly. Their most recent brief asked for a TV-PG drama series pitch along the lines of Samurai Girl and Naruto. But if they do change PR, they'll ensure it's child-friendly, like the new Star Wars series. I doubt they'll make it TV-PG though...