Nourishing Traditions: The Cookbook That Challenges Politically Correct Nutrition and the Diet Dictocrats: Amazon.co.uk: Sally Fallon: Books
So she says the sweet taste tells us that the fruit is ready to eat. When the fruit is ready to eat then, at the same time, its vitamin and mineral content is highest. The "sweetness" is a signal (maybe). But under modern conditions it no longer is.
That being so, do you want to eat something that fakes that signal but is low in vitamins and minerals?