Steve Gadd’s drumming on the title track is one of the greatest drum performances you’ll ever hear.
Wayne Shorter had a great sax solo riff himself and together with Steve Gadd’s solo, it’s an incredible performance.
There’s a YouTube interview with Shorter (from the making of Aja DVD) where he talks about working with Fagen/Becker and how they wanted “cred” in the jazz world. Considering Shorter played with “Miles”, pretty good start by the duo to get that cred.
http://www.jazzwax.com/2011/07/how-steely-dan-got-wayne-shorter.html