There are lots of deformations that happen from time to time. Martin's posting at the end of your referenced thread shows a couple he has seen on trees of a couple of varieties. (thread linked by BexleyRabbit in post #6). I've seen deformed figs that were "doubled" in various ways on Peter's Honey, Alma, and others. So the question: are most of the figs on this tree shaped this way? Or is it just a deformed fig?
Mike
p.s. spelling for Fetifero synonym is Dall'Osso... no "e" in it.