With the assumed lower cost of developing for a handheld vs a new gen console and the sizeable audience, you'd think third parties would be flocking to the 3DS but they aren't. I don't think the Wii U 3rd party problem is system sales, but for some reason they are just avoiding Nintendo altogether.
it isnt system sales. Its software sales. And western 3rd parties have never really been big on handhelds anyway. Even in the heyday. What really big series were put on portables and how much of them did big numbers like there Japanese counterparts?