Dan is right, I think.

In more general terms, regarding Cambridge, Martin Carthy pretty much says it all:

"The sort of mix-up that occurs when the folk and rock worlds meet is the sort of mix-up that always gone on in folk culture. It's utterly ridiculous to try to to keep folk music pure because it has never been pure; it is a mis-mash. The idea of there being a folk pedigree is a joke."

Cambridge is a fine festival. Not to everyone's taste (what is?) but fine all the same.