Hi, SS you make a good point and Chewy and yourself are half correct, but there is a very fine line between drying and cooking in a microwave and it all comes down to the thickness of the fruit!
Well, no. It comes down to the microwave setting (in this particular example).
Your method requires a 900W microwave blast for 8 minutes. That's cooking not drying. We could discuss it at a quantum mechanical level to no great benefit because your "cooking" method is just that; it cooks and as a corollary dries at the same time. But cooked drying isn't normal sun, air or low temp oven drying. It's clear your product is fine, but your method is different (by virtue of being cooked while drying) is all.

Cooking, which is what your method is doing, involves, of necessity, denaturing proteins and other complex molecular changes. Air, sun and oven drying, on the other hand, involves relatively little structural damage. It merely imparts a very gradual loss of water from the product. The resulting product is tangibly different as a consequence.
Ultimately, if it tastes good, who gives a monkey's? ;D