I seriously doubt both are running on the standard ARB2 path. J.C. has stated that in the latest build the R300 is roughly twice as fast as the NV30 on that path. I doubt an alpha would have that large of a relative difference between cards wrt the later version, even if the magnitude of performance for both cards improved by that factor for later builds.
I'm pretty sure the NV30 is running on an early NV30 or perhaps even the NV25 codepath. There's no telling. The R300 could be running on ARB1, or R200, or whatever as well. Those results are pretty worthless.
IMO, Mr. Derek Smart is a hypocrite: Only someone who is either (a) lying (b) ashamed of their products (c) just plain ashamed, would hestitate to give out some simple and straight forward information. - Derek Smart, Ph.D.