Thanks, Roger. I did some more research and found the differences generally distinguishing the two.

I was, however, related the local vernacular which may or may not be 'right'

Please put up some pictures or link to some with examples of earlier PB's. Our Indiana barns are exclusively of the later era of construction. I do not, for example, see the long sill to plate braces in any of these. Though I have observed this in square barns in Tipton and Hamilton Counties (due south of me) where the barns have a side-entry threshing floor that is not centered and opens all the way through the barn.