I agree with John, and would add that, while I personally tend to prefer certain kinds of approaches to open soloing, that I would not reject less conventionally organized solos - I have heard Joe McPhee, eg, play many times in a manner which is much different from, say Ornette; the good improvisor creates his own frame of reference. I like the concept of noise and pure sound, but I also feel that many of the possibilities inherent in it have been played out. Where I object is in the confusion of mannerism with style; I also have the sense that the avant garde has now defined it's own brand of cliches (it's been, lets face it, almost 50 years since this approach was first clearly defined);The burden of the improvisor is to say something new within these new kinds of confines. I also have issues with length of performances, and the inability of many musicians to self edit -