I couldn't agree more about the "kneejerk reaction" in response to dubstep. Dubstep was a niche genre that became too spread-out and over-used, and now there's an automatic "bleh, dubstep!" reaction because of how over-saturated and over-mimicked the genre has become.
The understandable bit of negativity comes from dubstep as a clusterf*ck of soundbite sampling, distortion, and synth with no discernible method to the madness. In pieces like this, however, there's nothing negative about the use of dubstep. In good dubstep, it's more than just synthesized chaos. This arrangement takes the source material and creates a unique and excellent song through the use of dubstep elements. This is definitely dubstep in a good way.