Like Fisher's Mom, I exclusively use King Arthur flour, passioncook. However, since I bake by weight, using an electronic scale, I can't address your question. As for the "region," I'm in far western Kentucky, so I would guess we enjoy a similar climate. I've been using King Arthur flour for years and years and love it. I can't imagine using any other brand of flour.
"As a girl I had zero interest in the stove." - Julia Child
This is real inspiration. Look what Julia became!