Seems possible, especially considering that there is a way to bring these same shading artifacts in Eevee - I did that just by plugging the normal map into an AO node and looking at the isolated diffuse color render pass I have a sneaking suspicion that the AO node may be utilizing Cycles for its raytracing (I doubt that…
right now there's no real toon shader, however you can achieve some toon like effects with the skin diffusion shader. if you set the shadow smoothing to zero, you get a super hard edge which can look pretty cool.