The AP oils have had Gen 2 licenses since the get go, I suspect they couldn't label the initial jugs as such because the spec had not officially gone live yet (although testing for it had been going on for some time). I also suspect that AP jugs are moving so slowly that there is not much opportunity for new jugs with Gen 2 labelling to hit the shelves, assuming XOM has actually made any.
The AP I bought was a decent deal, $40 with a $10 WM gift card that got used fast plus a $12 rebate. I bought it because it was the only 5W30 at WM with a Gen 2 license at the time (LSPI before posters chime in asking why I care about Gen 2).