Hugh, does rain, or lack of, effect taste w/ peaches at all? Last year our Macouns in the NE were less than there best due to a dry August/September. Here we go again and it has been dry for our orchard this August so far. I was out watering all afternoon yesterday, and I'm heading out right now to get at it again.
Dry weather is not usually a big problem for peaches if the ph factor is okay with your soil. This season was so dry and hot, early on that I did notice corking problems with my first variety of peaches. The peach loves hot weather and if it gets a small amount of rain it does fine and the starches turn to sugar producing a sweet tasting peach. When I grew apples commercially, there was always a problem with the Spur strains of Red Delicious. Corking always showed up and it blemished the outward appearance of the fruit. I sprayed Solubor to try to help and sprinkled granular boron each spring, but I still had problems. Solubor would also burn the leaves. It seemed like appearance was more important than taste at that time.