Vaderisnothayden said:
You have to remember, Lucas himself doesn't take the canonical status of the EU seriously, so it makes sense that some of his employees would dismiss it too, even if some others are busy promoting it as canon.
As for Splinter itself, it's been counted as canon by Leland Chee, who runs Lucasfilm canon (the "canon" that calls EU canon). So it's as much "canon" as the rest of the EU, whether it fits or not.
"Splinter" counts as Q-Canon... which is quality.
Even if it flies in the face of a lot of what came later, that was a real fun read, and IMHO really captured the spirit of Star Wars better than the majority of EU from the 90s and on.