>I think jazz has the most sophisticated improvisations. That
>don't mean that other genres (including mention music from
>around the world) can't have sophisticated improvisations but
>I do feel that if we are talking about it on a macro-level and
>in regards to genres, I think that's a fair and quite "safe"
>assessment. Interested in counter-arguments though...

I agree with you. I can't say I can think of any other genre except Blues that truly exhibits a good deal of sophisticated improvisation, but I feel it is more rare. To be honest the only real stand out candidate to me is Jimi Hendrix. The quintessential Blues musician whom played with a great Jazz players nuance. His songs were always an instrument to the expression, and that's not something you hear a lot of. Miles and Davis were supposed to collaborate on a project at the time of his death, just imagine what we would have heard if he had lived to explore Jazz with someone like Miles.