Another question I'd ask is, What is the total cross-sectional area of the two exhaust ports (prior to merging), compared to the cross-sectional area of the port just after merging (just after the blunt divider wall), compared to the cross-sectional area of the port exiting the head? From the looks of it, there is a relatively large "chamber" just beyond the divider wall, then it necks down again for the port exit. If so, I would think that small-large-small configuration would hurt flow. I'd love to see this head compared to both a stock head and a more conventionally ported head on a flow bench.
Another question is, Who designed the port configuration on this head? For example, I know the guy who designed the port configuration on the Garage Advance head (he has years of experience on top fuel bikes and other forced induction applications) and the SHP (Peter Blach) head (he has years of experience on forced induction Porsches). Both of those heads have yielded excellent results on Supras, yet neither of those guys use the configuration seen here. Therefore, I wonder where this one came from and what the performance results will be.