AJ, that is why I recognized up front the limitation in this blind test. Gene pointed out that they took notes on each speaker as they played, which, to a point helps with memory.
Having been a part of a blind speaker test many years ago, the speakers were judged in the same manner as Gene's. However, the second test involved proper placement via four guys, one responsible for each speaker, with duct tape to label proper position. The swap took about 20-30 seconds. Not perfect, but outside of having one's own "shuffle room" like Harman Int'l, it worked.
In the end, DBT or subjective, should be taken by the reader/potential buyer as info, to assist in narrowing down the speakers they would want to audition for themselves. Hopefully, the final audition taking place in their own room/rig.