here are a few interesting facts:

1) hanging the plant up-side down increasae potency --- More likeky hanging tha plant up-side down slows the drying process and h20 evaportation. therefore reducing terpene lost and giving more taste and aroma - potency not really

2) Allowing an extended 24-48  "dark time"increase potency _ Many  terpens are voliated and evaporate in warm temps, as soon as the light come on they begin to dissapear. --- Keeping the plants in the dark gives these delicate terpens a chance to make it to the drying room

Reference: MJBIZdAILY.COM