That doesn't sound right. A cutting is exactly identical to the original and should produce fruit identical to the original, that's how most fruit trees are grown these days, a cutting is either grafted onto a new rootstock or rooted, the rootstock should only control the size and rate of growth of the plant and shouldn't influence the fruit at all.
Dan from what I have read on grafting fruit trees is the actual variety of fruit tree is grafted onto a different root stock. And that the fruit may be close but not exact if grafted onto another root stock. Dan I may be totally off here but my internet is loading so slowly that I can't get the pages to load to search them. I will look again when my internet is running better.