I just took a look at the itunes site to see how effective the Wynton ad has been. "Sparks" is not on the top 10 downloads list, or the top 100 downloads list, but is has made today's top 10 jazz downloads list. Then again, What a Wonderful World (Single) is on there three times... As far as complete album sales are concerned, the live session featuring "Sparks" tops the list, followed by Thelonious Monk Quartet with John Coltrane at Carnegie Hall.
I'd be curious to see some numbers behind the rankings, i.e. sales dollars. The Marsalis could have been downloaded twice, while the other nine on the top ten were all downloaded once. Who knows.