Thinking about FF as neo-folk makes me realize that the genre is all about auteur-ship. What I mean is that the personality of the leader is the main point, and this is what distinguishes neo-folk from trad folk.
60s Bob Dylan is the definitional artist of neo-folk. John Fahey is the Velvet Underground of the genre. Are Belle and Sebastian in this genre? What about Bon Iver?
Joan Baez is trad folk, not neo.