I believe Bob Moses was taking issue with artists like Merenda and Kenny G(who I believe should be taken out back and shot with a ball of his own poop) that are exploiting the names of these jazz giants for their own ends. Covering tunes happens all the time in jazz. In fact, it happens so much that these tunes become "standards". Any working jazz musician worth his salt is expected to know a great number of these "standards". The language of jazz is highly sophisicated and complex to say the least, and it can take a lifetime to understand(I've been in college for three years now studying it and i've only begun to scratch the surface) The years of study devoted to understanding the fundamental aspects of jazz(like chord/scale relationships, the ability to listen and react to harmonic, melodic, and rhythmic ideas etc.) are only tools to get you to what jazz really is about... and that,(in my most humble opinion) is INTERPRETATION. You could get 10 different groups of jazz musicians to play, say, "autumn leaves" and I guarantee no two versions would sound alike. So yes, it's great that bands like Sister's Euclid, MMW, Garcia/Grisman, cover the likes of Mingus, Miles etc. because they are honestly following the jazz spirit of interpretation, not just shamelessly using another artist's name as a promotional tool to sell more albums/tickets. P.S. Kenny G should apologize to everyone, everywhere for ever picking up a horn. Seriously.