It's exaggerated I would say. The switch is far closer to xbone than Wii U at this point and with engines like unreal 4 and developers claiming time and again the ease of portability unless you count really intensive games almost all games can be ported to switch at not that much hassle if the developers are serious about it. I mean how long did it take for snake pass to be ported? Two months or something?
Definitely easy to port games too from what has been written from many sources but that doesn't mean it can port more ambitious games if those games need a more powerful gpu or more cpu resources.