I wouldn't have thought the Amish had the ability to maintain consistant practices in this regard in each community. Rapid mutation is built in to their customs at the community level.

As I recall, all Amish communities are descended from ones that were either declared apostate by Ammon (I think that was the name) or later as a peace offering. I could look it up in _The Amish_ but lassitude calls and I must drape myself across the couch like pre-Raphaetite maiden.

My Mennonite cookbook comes without actual measurements aside from "enough". I guess I'll know when it was too much or not enough.