Most of the stuff is all marketing, right? These are questions I am struggling with as well. We have a couple of people trying to brew South African Pale Ales (SAPAs) or Cape (the region) Pale Ales (CPAs) and stuff like that, but most of it is marketing as the ingredients, as you said in your post, comes from various regions across the world, so why call it South African or Cape? Other smaller breweries have been putting local ingredients into their beers (I just drank a beer made with Eucalyptus leaves from the farm on which the brewery is located - but Eucalyptus are non-indigenous trees...); but we soon run into this problem of what makes something local and true to the region? I am not sure, maybe we have lost all ties to history and place-bound things, and everything is marketing!

Sorry for the long comment and the quasi-rant. I hope I understood your post correctly! Anyways, glad you had a good beer - the stout looked amazing. Enjoy!