It is indeed, and on a very enjoyable one at that!
Personally, I think that the period of around 1966-1974 (or whenever it was that they broke up) were the peak years for the band. Start with Live at the Lighthouse and go straight through to Blues On Bach..a very/fully realized band concept not at all hampered by the onus of "experimentation". These guys were done experimenting, they were DOING it.
John Lewis...I hear people who dwell on what he didn't get so good, but what he did get right....it was very right, and there's a lot of it. His comping ( if you must call it that) sets up an architecture for the rest of the group to pivot around...not everybody digs architecture, but if you do, the MJQ of this period has it in a glorious abundance!