Thanks to everyone for the edifying discussion. To me Doubleday seems to be saying, the NSP are a rude, wee thing with enough charm to make them worth preserving, and within its narrowest scope in its own way it's quite nice, really. Another way of looking at it is that he's saying "fa\g a phiob bhochd", "leave the poor pipes alone," which makes good sense to me too. All that is fair enough. Contrast that with George Sand's novel, The Bagpipers, which is truly inspired by the rude sounds of peasant instruments. I think she wrote about the same time as Doubleday.
The discussion lost me when it took on the topic of most expressive instrument. "Whatever gets you through the night," as the late, great Liverpudlian once sang. All music is nostalgic and so much depends on your frame of reference. When I first heard the NSP when I was about fifteen I was drinking tea in a close corner by a wood stove after a cold, wet day of scavaging fire wood from a logged off patch where alder and madrona were left to rot. My friend, Sandy Ross (somehow related to Colin), put a recording of Billy Pigg on the record player and I was hooked. If he had put a recording of the best violinist in the world I would have hurried out the door without finishing my tea. There is much more to the context of that moment, social and personal, that made it so important to me. But suffice it to say that for all it's many flaws and short comings the NSP are the only thing that works to express some things for me, and every time I hear and play them that moment of contentment and happiness shines through. Of course, I have many flaws and shortcomings, which explains a lot! To get on or off this list see list information at http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html