personal opinion: i think that freezing would be like drying too fast in the sense that the buds would retain chlorophyll and have a "green" taste. freezing would stop the chemical break down.
freezing seems to work ok for me after they've dried slowly and cured.
According to Jorge's Medical Growers Bible, freezing accelerates the rate in which moisture dissipates from the buds. It causes moisture to force it's way out the pores unnaturally] ,which results in trich damage.