I've phrased a similar idea in a different way.
Most of the major western publishers grew up in the PS1/PS2 era. Technically, Take 2 existed before the PS1, of course. As did Electronic Arts. But it was in that time period that both went from small companies to large ones, where EA grew from a company of perhaps 1,000 employees to >10k.
During the height of the PS2, there were years when EA was regularly making net profits exceeding 500m: for contrast, this is likely more than Microsoft will make in the E&D division for the entire generation, and of course more than Sony too (since they've lost boatloads of money).
So the design and production philosophies of most of these western third parties were shaped during that PS1/PS2 era, and as such they're likely to prefer systems that are clear, consistent upgrades on that design philosophy, with modern bells and whistles added in. This philosophy includes:
1) A focus on more "epic" games, originating all the way back to the games that made the Playstation like Final Fantasy 7 and Metal Gear Solid. This means a stronger focus on presentation and narrative.
2) An intense focus on 16-35 male gamers. Sports games, shooters, racers, "badass" or "dudebro" games.
3) A heavy preference for the traditional game pad over alternatives like the Wii Mote or Kinect.
By contrast, Nintendo's games tend to de-emphasize presentation and narrative and instead focus on mechanics; they tend to focus on broad demographic groups (Wii Fit was a hit with grown women, Nintendogs a gigantic hit with young girls, Mario has always been a hit with people of all ages, etc.), and has been the most persistent of the big three in exploring alternative control methods.
When combined, this means that Nintendo is simply philosophically out of step with the big publishers like Activision and especially EA and Take 2. If Nintendo wants to connect with Western developers, they'll either need to grow their own (As in inside the company), or foster the growth of new ones like Fifth Cell, Level 5 and others which are more in sync with their design philosophies.