The model is good but the shader lacks of realism…
As said before, play with some textures and bump maps and add more of the glossy shader (change the env for more interesting color reflections)
He actually used the Keyshot engine for rendering (which is a professional, but very expensive render engine initially designed for showcasing products or models).
It’s actually kind of strange in this case that one would say the material lacks realism, because their websites advertises their material options being based on measured data and even allows you to just drag a pre-made physically correct material onto the model (again, based on actual measured data).