Unlike Bauer, I have used feathers in the rain and HAD them effect arrow flight dramatically. For my compound, I use nothing but vanes. There are good and bad characteristics with vanes, however, as long as I do not have and contact while the arrows leave the bow, I will be using vanes because of their ability to shed rain and moisture. In my experience, FWIW, I have also found vanes to be quieter.

I' m not sure about Bauers comment about feathers having less drag them vanes. I believe it is the other way around.