Sure, but what about a title like Zombi U?
New IP, sizable marketing support from third party publisher + 1st party publisher support, innovative concept, popular themes.... 10% adoption rate. NSMBU, which many cite as a weak effort, a rehash, not innovative, flooded market (didn't they JUST release a Mario game for 3DS last week??).... 70% attach rate. Which is just insanely high.
What kind of message does this send?
It's not a stable base of examples, sure... but it goes a long way to indicate that Nintendo is not capturing any other market other than they'e standard hardcore fanbase. They buy Nintendo systems day 1, and they buy it for nitnendo games. that's it. they haven't converted anyone else to buy the wii u, even hit buyers or traditional core purchasers.
that's the issue they face now, and it's a tough one!
I trust they'll make some gains, for sure, I really enjoy my Wii U. it's just been a real difficult transition, they weren't ready for HD development even, let alone adding the layer of the gamepad and educating consumers on its benefits.