How does it work? I thought different trees would need different amounts water, sunlight, etc. Combining too many different kinds would give suboptimal fruits. Are these apples, peaches as good as a single tree?
Grafting is an standard technique in agriculture and I think there are a lot of grafted trees in commercial production, so I guess this is not a hoax.
Anyway, I agree that it's very probable that the combination may provide suboptimal fruits.