Yes, that is the shader.
It does not seem to play well with Octane Standalone 3.03.3

Hey all, we are trying to set up a texture/mat pipeline for Octane Standalone v 3.03.3
The MBB_Quixel_PBR shaders are not matching what we're seeing in Quixel. (gets closer if we jam the roughness gamma down to .3 in Octane)

I'd like to find out if anyone has had recent success with a combo of a ...

Please enable the "Verbose mode" in Octane global settings and attach here the batch render log file.
5/19/2015

Starting "C:\Program Files\Autodesk\Maya2015\bin\mayabatch.exe"
Error: file: C:/ProgramData/Autodesk/ApplicationPlugins/MayaBonusTools/Contents/scripts-2015/bonusToolsMenu.mel line 1546 ...

I got the stand alone and Maya plugin from the Metaverse contest page.
I have had good luck rendering stereo cubemaps for vr.

However, I am running into a roadblock with batch rendering. I go to batch render in Maya, on a scene that I've set up with Movable Proxies and and animation and it just ...