The 2 trees in the photos I posted are the same age, planted in ground in the spring of 2009 all at the same time. I described our 'fig forest' in detail in this post:
http://figs4funforum.websitetoolbox.com/post/factors-that-end-winter-dormancy-7925109?highlight=fig+forest+baumgrenze&pid=1290936153
In this post there is an after pruning image of 4 trees on 6' centers, planted in a 12' x 14' strip between two driveways. The trees are kept small by pruning for main-crop figs only each spring.
I confess, I do not meticulously count leaf nodes and pinch out the terminal bud. I wait until much of the new growth has passed 6-8 leaf nodes and then cut off the excess, but both cultivars were treated alike. On one or two of these grafted branches I see tentative regrowth. These may have been cases where there was not much growth below the terminal bud when it was removed.
Because I like Lampeira, because I was 'pinch/pruning' for yield, in 2014 I began learning about fig grafting. I grafted both the Osborne and the Panache over to Lampeira using the 'bark graft' Joe Real taught us for citrus and deciduous stone and pome trees. These grafts were by-and-large successful. Some even produced nice fruit in 2015.
That said, limiting new wood to 6-8 leaf nodes reliably results in a good fruit set with Lampeira. With Jurupa (the cultivar that shows regrowth and new figlets) the results are less reliable.
Later in the summer of 2014, and also in 2015, I did further topworking of the Osborne and Panache with varieties from friends and neighbors. Some respond with figlets at many of the leaf nodes, others only occasionally.
I will do my best to remember to report again later in the 2016 season.
There are other anecdotal observations I believe have some validity. I took to heart Axier's observation regarding fig chip grafting, that new wood on new wood worked best. Also, if the scion is placed on a particularly vigorous, apically dominant branch, the growth of the graft seems to respond to the placement. A graft made at the end of an otherwise similar horizontal branch is slower to take and slower to grow.
Added in an edit ~15 hours later.
In gathering some images for a talk about fig grafting at our local CRFG meeting I found a photo of 2 2014 Lampeira grafts taken in January 2016 before I pruned. I estimate from the photo that I made a pinch/prune cut at 8 nodes and each grew 2 new branches of 6-8 buds that I failed to remove later in the season. The first of the 2 photos below shows the branches. I added the second to show how 'drastic' pruning for tree size and main-crop figs only can be.
Enough for now.
thanks
baumgrenze