I think rather it's much more straight forward, Apple's mobile devices make up the bulk of their income, it's where they're pointing their business as a whole now. A growing segment of their mobile device sales aren't covered by any EPEAT certification at all (iPhone/iPad). Future Apple devices are going to be increasingly complex to disassemble, and this is seen as a competitive issue too, in the pursuit of thinner, stronger and more attractive enclosures. I think they were just getting out of EPEAT before EPEAT caught up to mobile devices, a quiet exit (or so they hoped.)
