Quote from the article:
"In their study, the researchers calculated the heat loss of the boxes along with the thermal impact of certain beekeeping practices. All the experiments looked at the heat loss only from the boxes and their non-living components (honey, wax, etc.). “The reason I left bees out of this study was that there are far too many behaviours that occur in the hive for thermoregulation,” Cook says. “It is not an easily applicable constant!”"
I would have thought bees were the crux of the matter. They (and DerekM) have proven that an insulated box holds the heat in better than a wooden one. That is not disputed by me, but bees do not rely on the ambient temperature in the box being constant.
(Takes cover)