It would depend entirely on the growing season, and the availability of plant material at the desired time. Here, in the north, it would never work to wait long enough for a tomato plant in the ground to sucker to provide new plant material. By the time they get that big, the season is well under the way, and we often have a struggle to get tomatoes to ripen before first frost if we don't have access to a green house/cold frame. However, if not growing your own seedlings, and plants are available at the nurseries early in the season, this approach would be great. Because the plant already had good size, it would out pace seedlings. Tomato cuttings readily root, so the tops would take off and do well. The remaining rooted stem would do best if there were a few leaf nodes to send out new top growth. However, I wonder if this would work as well for determinates as it will for indeterminates.