I have seen this youtube video on growing Echeverias from leaf cuttings. The grower takes leaves, but he prefers to use the ones on the flowering stalk, so that he won't be left-out with a smaller rosette.
At around the middle of the video, he says that E. Agavoides normally sends-out a flower stalk with small leaves. At some other times, however, the leaves come-out bigger and more suitable as leaf-cuttings.
What would affect this behavior? Can I let all Echeverias, Graptopetalums, sedums and their hybrids do the same?