I don't think there'd be many who would use Derek as a standard example of the genre...

Jazz is a broad camp, especially in terms of history, tradition and diversification. I came to Free Improviation around about the same time I was getting into Folk & to me they two sides of a similar sort of coin: chamberish, grubby, fiercely non-commercial minority sports wherein admirable political principles were tempered by an inclusiveness that appealled to my adolescent outsider instincts. As a 15-year-old I could happily watch Derek Bailey one night and Martin Carthy the next (as occasionally happened) and even now I might often sing a Traditional Ballad with an accompaniment inspired by Derek's playing - check out The Wife of Ushers Well, currently track #5 on my myspace page.

neither glueman nor sinister supporter know much about the study of ethnomusicology,

Believe you me, I know well enough about the study of ethnomusicology - just as I feel some small appreciation of the discipline might help various non-academic Folkies out their particular box and maybe provide some much needed objectivism. My mentioning of the aims of the ICTM was to show a broader academic base for a notion of Traditional Music than many folkies would allow, or yet appreciate.