Let's be clear on this: the Wii U is failing. It is not making money, it is not meeting Nintendo's expectations, and it's helped erode Nintendo's third-party support.
Nintendo may yet turn it around, and it's entirely possible it could later be a success. But just because something has potential to succeed later does not mean it isn't failing. I can't imagine how someone could call it a success right now, at the very least.
I believe in honesty, civility, generosity, practicality, and impartiality.