I'm curious to hear your results Mark in Texas. Mangoes don't all seem to wash out, but definitely had a few disappointments this year. I'm not sure if the over watering is more detrimental right before harvest or during other stages of development. Maybe start a new thread with your results, especially if you have previous experience with those varieties to compare with. I love sweet tart too!
I've seen great jackfruit turn almost inedible with heavy rains...
UPDATE: just tried an OS and a LZ side by side from Dr Campbell (latest batch) and LZ wins it for me(barely). They definitely tasted a little different to me. I love that "lemony orange crush soda" flavor if the LZ. Could be differing ripeness stages. I enjoy PPK and LZ a little under ripe. The OS may have been a little past prime if it ripens the same way.
I don't think you can match with hand watering, what mother nature gave us about a month ago. 2 weeks of solid rain, every day, all day. I don't think you need to worry about creating the washed out flavor in the mangoes even with some aggressive manual watering. We just can't match that complete deluge that we received. I am a little more in the central Florida area and our season is a lot later than the season in South Florida, so my mangoes had lots of time to acclimate back to normal conditions. So the mangoes that I am harvesting now show no signs of the washed out taste experienced by others several weeks ago.