You know, every time I hear some crack along those lines, it makes me rankle.
As I started getting into jazz, for whatever reason the "free" thing was what attracted me the most. Maybe because I came from punk/garage/post-punk music to this music, but... anyway, my dad was a jazz pianist. He and his guitarist were sitting outside talking and my dad mentioned to this guy that I was "finally" getting into jazz, but that it was "free jazz." The guitarist smiled and said "is that where they play free instruments?" I guess that was my first inkling that, well, most of the jazz world doesn't appreciate it - 50+ years after the die was cast.
The melodic/rhythmic ideas embraced collectively by "free" musicians is still what I cherish the most in this music. Don't ask me why - it just is, even considering that I've explored and enjoyed many other areas of jazz.
The piece that Guy posted is interesting, but as with anything, there is much cross-pollination and, in some ways, the idea of setting up divisions goes against the freedom in creative music, the desire to draw from oneself as much as from other sources.