I ran a small outpatient physio service in a country town in australia in the early 90's. To my amazement I had about 7 cases of Wikipedia reference-linkBell's Palsy in the one year. Carrying on the work of the PT's before me I used electrical stimulation in conjunction with medication and oral home exercises. It seemed to work pretty well though some of the ptosis's need surgical help to protect a residually droopy eye. I had no control group but hey the success rate was pretty good. I think early intervention would be a good idea, are there any studies to say it is not???