Long time fruit grower @Lucky_P had this too say in below comments about Northern Blueberries in the area we both live in. He lives up in Hopkinsville, Ky area about 15-20 miles north of me. I couldn't agree more with his assessment.
"That said, I'll never bother with a Northern highbush type again... the level of production is so paltry, compared to what a good rabbiteye will do here, that there's no reason for me to waste space on a NHB. Rabbiteyes here are more vigorous and probably 10X more productive; I want BERRIES, and lots of them! I have one child who will eat a gallon of blueberries in a day (fresh or frozen) whenever he's home!"