Tom, could be but not really. Back few years, I was chatting with my mailman. He told me that his dad grow figs in ground for as long as he could remember .His dad's fig was brought over from his hometown back in Italy. But he does bury the fig during the winter time. I also read in GW years ago that someone in canada grows desert king, celeste, etc. whole bunch of figs in zone 4-5. and manage to get fruits.
I don't think there are enough heat left for main crop to ripen. They will drop when temp drops. I usually got reliable fruits from breba and in pot fig, only handful from in ground fig. However, this year, my in ground Hardy Chicago did not grow a single fruit, neither breba or main crop!! I pinched this spring, still not fruits, all leaves, very strange!