I also have some older fig trees that grew very fast from soil line,this Spring and only now are forming fruits.
It is the result of extremely cold Winters,2 years in a row.
Try to protect them better during Winter,using better methods,like I will be doing next Winter.
I found a shrub cover,is called Nu Vue,and is sold on internet.
I bought 10 of those and I will stuff the tree with a lots of leaves and cup it with this Shrub cover.
We will see next Spring,if it works.
However,I do have a couple of cultivars that produced a lot of early fruits ,after die down,but they are exception,to the rule.
Edit note So The rule is:The more live old wood you have,in the Spring,the better the chance your tree will ripe fruits.