I attached a screenshot of the current pre-beta build, since the 0.9.5 alpha is quite very old. Rendered is an image of a NURBS dataset with around 1200 NURBS-surfaces and a few thousand trimming curves. Again, note that there is not a single triangle in that scene - ever! Therefor you can zoom in as close as you want and you'll never see edges of triangles. Rendertimes are also very short - this on was rendering one or two minutes or so, however, the image looked nearly the same already after a few second. Computed on an Core 2 Duo, no graphics hardware involved.