Good work sleuthing that out. I wonder if you could somehow reach the researchers themselves. It looked like one of the websites said the appearance was not good enough for commercial. Not sure if that is the real reason. I really like Sweetcrisp blueberry but it produces about 1/4 of the crop I get from Emerald and I could see why commercial growers don’t grow Sweetcrisp. It wouldn’t surprise me if the Gurneys explanation is the real one - not pretty enough.