Well I don't see it much as a stunt but more of a 'cut our losses' act. A digital music store can offer the music as a download is a very quick distribution method versus printing covers, making enough cd burns, and to dispatching them to stores.
While it may not be the best, it offers those on the fence about what is stealing versus what is legal at least an option in a timely manner. Those that stick to doing the right thing will do so anyways.
As for AAC? The numbers say that Apple has the largest share, so the 'most of us' comment actually belongs with Apple. 8)
However, he could have slipped and said 'Apple' much like people say 'Klinex' and perhaps just ment digital download for purchase. Eitherway I don't think musicians should play favorites and strike deals with any specific format. I don't need yet another person making a choice for me, that is my job.