Durational approaches to Ancient Greek metre have been rejected (in my opinion, with good reason) by Devine and Stephens (e.g. in "The Homeric Hexameter and a Basic Principle of Metrical Theory", Classical Philology, 1976, 141-163 and more thoroughly in their 1984 book Language and Metre), since they are inconsistent and unnecessary to explain the rules that have been discovered for different types of verse (something that they, together with scholars like Van Raalte, Sicking and Beekes, have done using rhythmical or rhythmical-linguistical analysis). I would like to know, if possible, how is the “V-to-V distance” concept different to (others?) durational approaches and what (yet unexplained?) rules do you expect might it help to explain.