I've been able to get relatively mature plants from cuttings as well as from the emergence of basal nodes myself. I think it all depends on how mature and healthy the plant is overall before you cut. Likewise I don't always wait for basals before taking cuttings - I'm confident enough in my ability rooting cuttings that I'm not worried about losing the rootstock if it doesn't produce new growth. But those are good cautions - I'm probably more of an exception to the rule. I've generally waited at least two to three years before attempting cuttings, and only propagate plants that have been growing consistently and vigorously. Cutting from a vine that still has plenty of green stem and healthy leaves beneath the cut is relatively safe; it's when you cut all of the green parts off and only leave brown, woody stem that you're really risking losing the rootstock. The plant needs to be able to photosynthesize in order to recover, otherwise it will just be working with the energy it has stored in the stem, which will almost certainly limit the size of the new nodes it produces and result in setbacks. I think Peter's answer may be a relatively conservative one.