The fad or giant leap forward has only recently reached our shores here in the U.S. It remains to be seen whether the grafted varieties fullfill the advertising hype.
A company in Cottage Grove, Oregon have devleoped a series of the tomatoes and so far, they appear to bear fruit earlier keep bearing later and are much more resistent to black spot and other fungal type infections. Seem to need less water as well, whcih is a real added bonus here in the semi-arid inter-mountain west... We'll see...