It is set in my book. I always go by what the stave looks like before tillering, compared with what happens after. It might be set, but not necessarily string follow. A stave that was naturally deflexed yet takes barely any set, still looks to anyone that didn't know what the stave originally looked like, is perceived as a bow that has taken string follow.
You are a very experienced bowyer, is this some kind of crazy trick question? If a tree falls in the forest, and it happens to be osage...
