Here's my end of the season update on my grafting experiment. My fig trees here probably have almost a month left before they go dormant, but things are cooling off. Night time temps have dropped into the high 40's the last few days. Still getting some figs. I'm thinking about oiling a bunch of figs on my Panache because they don't seem to want to ripen. That's a different post question though.
I repotted my Black Madeira grafts back in May from one gallon pots to 5 gallon bucket SIPs. The brown turkey rootstocks suckered a couple times, but I kept removing the suckers to encourage scion growth. In the last couple months the suckering has lessened a lot. The grafts did pretty well in their first year and it's an interesting comparison between the grafted Black Madeira and a rooted cutting Black Madeira I have. I didn't get any fruit off the grafts this first year, but I got a handful off the rooted cutting, so some of the growth potential of the rooted cutting may have been used on fruit instead. Some pix:

Above is a picture of one of the Black Madeira on Brown Turkey grafts, about 4 foot tall now. I let it grow as a single stock and didn't pinch it because I didn't want to encourage rootstock suckering. Next year I'll try to encourage some branching. One interesting thing is the scion took on similar internode distances to what the Brown Turkey rootstock would have had. The leaves are undeniably Black Madeira, but the growth habit is remarkably like Brown Turkey. It doesn't have the stunted, gnarly, tight internode distance habit of Black Madeira at all.

Above is a picture of the graft union. I used cleft grafts. The graft union has healed and isn't very noticable at all. This is my first try at grafting figs, but I've grafted quite a few citrus and plum/nectarine/peach trees. Fig grafts seem to heal much faster and more completely than other trees I've worked on. So far I'd say Figs are the easiest graft to succeed with I've tried, but I've generally had good luck with all the grafting I've tried. I suck at rooting figs though and have lost some valuable cuttings in the past.

Above is a size comparison between a grafted Black Madeira (left) and a rooted Black Madeira cutting (right). My pictures aren't the best, but some of the differences in growth habit are easily noticed. The cutting was rooted last fall and spent a couple months dormant on my back porch last winter. The graft was made in early April, so the rooted cutting has a 6-7 month headstart. The cutting made a 1/2 dozen fruit, the graft made nothing.
I consider the experiment a big success so far. I don't have enough examples of both grafted verses rooted to prove that the grafts gain vigor and growth rate from the rootstock, but it certainly looks like it. I didn't expect to see the amount of difference in growth habit, so that's interesting. The next year will be very interesting to see what kind of fruiting I get. Both the grafts and rooted BM should be coming into more productive ages.
This coming spring I hope to do some more grafts. I bought some LSU purple and Celeste tissue culture plants back in May for use as rootstocks and they have been sizing up in one gallon pots. They ought to be just about right for grafting in the spring. I hope to find some CdDG and Ischia Black cuttings on Ebay for a reasonable price sometime this winter. Unfortunately I don't have any more Brown Turkey rootstock plants going, so whatever I do this winter won't be absolutely comparable to this years grafting experiment.