All I can say to that, is I can see a difference And of course the examples I used we much simplified. In the case of contrast I hardly ever use the contrast slider in my raw editor. Instead I use the curve tool, so it's more about be deciding where to put the contrast (highlights, mid tones and/or shadows) than just moving the contrast slider down a bit. Similarly with saturation - I am more likely to adjust the saturation of a couple of colours than use the saturation or vibrancy slider. With WB it's much as Glenn said above - I am not after total colour accuracy as such, it's more that I will tweak the WB to give me the look I want- and that might not be exactly on any of the in-camera WB settings.