back about 3 yrs ago when i first joined the forum, Black Madeira from USDA/UCD was known to be hard to root. i'm not sure why that was. i rooted all my USDA/UCD cuttings. however, those who were having issues back then had more experience that i do when rooting figs, so i believe my rooting were all beginner's luck.. two yrs in a row.
i think as the time went on, people found new ways to root, and better way to control the environment for the rooting practice leading to better results. new baggie method, peat pot method, root riot.. they all help with rooting now days. some are experimenting with root hormones and such.
one thing i can say is fresh cutting in the early spring is best way to go. do no store the cutting. get the cutting in late march or about a month before your night temp hits 50, and start rooting. once it has good set of roots and night temp is above 50, leave it outside where there is fresh air, humidity and sun. make sure to introduce to sun slowly, or you will lose all the leaves.