Short answer: Yes, quick drying does not allow the plant to reach its full potency potential.
When you cut the plant, its branches are still very much alive. Therefore, the plant will continue to perform its metabolic processes in order to produce energy.
Among these processes is the conversion of cannabergerol (CBG) to tetrahydrocannabinol (THC). You do not want the CBGs as they are non-psychoactive.
Another process is that of decarboxylation, which also takes place to a degree during curing. This happens when the THC hydrocarbon chain looses the carboxyl group attached to it. This process is needed to convert cannabinooids to usable psychoactive forms.
Also, during curing, some of the terpenoids found within the plant become phenolated, turning into cannabinoids and further increasing the potency.
All these processes can not occur in the absence of water.

-AR