OK. First, let me retract the word "arbitrary" since the channel track was selected for having adequate balance. I had earlier selected and submitted the pool of recordings, they were quite familiar to me and I not think that there was anything strange about the individual channel tracks played. After all, it was also with unknown speakers in an unfamiliar space.
It forces one to particularize one's assessments rather than to simply express a preference. One has to convince onesself of the reasons for the preference.
Remember that Harman intrinsically dislike reviewers - but they need them! All IMHO, YMMV!