On a purely gut level it seems sensible to me that any type of processing done to food would alter it from the natural state. Freezing seems to fall in the category of processing. Even meat is not quite as good when it has been frozen. Remember how all the juices run out when it thaws and doesn't have the same flavor as before? And, frozen fruits are notorius for having added sugars! arrgh!
"Lack of sleep makes cowards of us all."