PCGH did their testing confirming the performance uplift.
But they had several notes regarding the hybrid ray tracing methods, it looks like this is now used to make previously non-reflected objects, become visibly reflected. So some foliage (grass, flying leaves) and fine particles were previously not visible with the DXR reflections, after the patch they are now reflected through SSR, while the rest of the environment is reflected through ray tracing, large foliage like tree tops and branches are also ray traced.
So the patch increases the image quality in this particular aspect, but introduces some limited SSR artifacts into the mix.
http://www.pcgameshardware.de/Battl...5-Day-1-Patch-Direct-X-12-Nvidia-RTX-1269296/