The last portion of Tyll's review was subjective comparisons to the best of the best headphone set-ups and there was a bit of a time constraint. While I would have loved to have a LAu sent his way, the one and only preproduction unit available at the time was unfortunately on a Fed Ex truck headed toward a meet. Tyll was using the EF-6 and I felt he could use some contrast. The Burson Conductor has a tonal balance that better matches the AB-1266, has the power to drive them, and was available to ship to Tyll for the next day, so it was done.
Thanks for the explanation Joe.