He posted 18 renders and a video. Still believe it was not a render? Perfect then, as madcoo mentioned, this is the best compliment you could make about his work. Accuracy of materials and realistic output is probably what RS is looking for the promotion of Octane.
PS: I used his blend file to debug my new exporter a couple of weeks ago, shortly after the competition. True and splendid work.
Desktop: Ubuntu 13.04 x64 - i7-3770K @ 3.5GHz - 32GB DDR3 - GTX670 2048MB
Laptop: Linux Mint 11 x64 - i7-2860QM @ 2.5GHz - 16GB DDR3 - Quadro 3000M 2GB
Software: NVidia 319.12 - Cuda 4.2.9 - Blender 2.66a