Nintendo's president, Satoru Iwata, has sad that the slow, thin release schedule of games for the Wii U was deliberate by Nintendo. It was a choice they made that is in line with the company's values.
Those values are rigorous, high standards to create "carefully developed" experiences. Speaking with investors in a call that followed Nintendo's recent financial results, Iwata addressed the less-than-stellar performance of the Wii U. Ultimately, he acknowledged that the release schedule has had an adverse effect on the Wii U's sales, but it was because of choices that Nintendo deliberately made.