Just a quick test of the instancing capabilities. In this test there are 1,323 Imrod Models SVODepth(11). Only one copy of the octree resides in GPU memory taking 75 MB; the rest are instanced but have there own lighting.
800x600 ~30 fps - SVODepth(11/8) ~ 50 Million visible voxels
2x GTX 680
This is a low resolution render of a scene that utilizes instancing of only two octree models. I am now in the process of developing an octree based scene graph data structure. This scene graph octree will reduce overall overdraw and speed up rendering substantially.