No one knows that for a fact, but the basis of Shaymin's article is a report from Unseen64 stating that Nintendo of America is passing on Devil's Third due to concerns about its quality. Shaymin also pointed out:
Both NoE and NCL are treating this game as a contractual obligation at this point, though.
NCL: Game is Amazon exclusive (when the hell does ANYTHING get a retail exclusive in Japan) for physical copies.
NoE: Only localizing the game into English instead of all the European languages.
We also know NCL picked up the game so it has an incentive to recoup on that investment despite being known for canceling and delaying games due to quality. Nintendo of Europe has a history of publishing anything which sounds great but probably isn't the smartest way to do business. Also, Satoru Iwata is CEO of Nintendo of America so he has the authority of overrule anyone at Nintendo of America who decided against publishing Devil's Third.
It's easy to point and say, "Well, Nintendo is publishing Devil's Third in Japan and Europe, why not America?" but there's a lot more to it than that. Unseen64 broke the news and apparently spoke to people who have played the final code in Europe, the consensus of which was unanimously negative. Unseen64 is a pretty reputable source; we probably wouldn't be talking about this if it wasn't.
Personally, I want the game published
eventually. However, I've been condition as someone who predominantly follows Nintendo and buys a **** ton of its games to expect a certain level of quality. While I've become a more savvy consumer in the past few years, I've bought some trash games in the past and have wondered how any company could think it was okay. Nintendo has delayed dozens of games for this very same thing so it's jarring to say the least that it's publishing a game it has little faith in. Devil's Third is exactly the type of game Nintendo would have delayed in the past. Not that Devil's Third is on the same level as Zelda, but Nintendo delayed Ocarina of Time, for example, a bunch of times until it was done right. It wouldn't be so revered otherwise.