I'm a bit confused, since my experience doesn't match what I'm reading here. About two years ago my girlfriend got full AS credit for an AF ticket consisting mostly of DL codeshares. This last March she automatically got credit for one of two AF segments on a DL ticket (she needs to send in the boarding pass for the other).

What's more, the rule I learned was "mileage follows metal". Is this a new choice for AS? Or is it for partners other than DL/AF?