Don´t know if the source is right but I´m expecting this and people should be expecting this.
Third party support actually seems to be stronger on the Vita. The Vita is getting a healthy flow of releases still, and it is literally all third party. Every last bit of it. On the other hand, the 3DS's third party library is comparatively weak when compared to the Vita, and especially when compared to the DS and PSP. Even then, if you check out Metacritic's overview of 2014, they actually have more rated Vita releases than 3DS games with a higher average score for the Vita releases and less falling into the red for ratings. It's really an illusion that the 3DS is getting some kind of magnificent third party support. I own a 2DS myself, and of the six or so games I own, only one is third party. On the other hand, about a quarter of my near 20 game Vita library is first party, and the rest is third party.