Thanks!In my experience an average of 2-3 weeks is common. I would place 5 or 6 in a 6" container. Then in 2 weeks I would GENTLY tug on a cutting. If there was any resistance then you have roots. The reason I said they would normally root within a month was that when a month was up they would either have rooted or they weren't going to. I would then place them underwater and GENTLY pour them out and if needed seperate them and repot.
So I just checked on my fig air-layer for the first time! It appears that I did not even skin the bark before air-layering so that probably is a big reason why it's taking so long. (Plus the winter/timing).
However, I did see one small root which I accidentally broke because I thought there were no roots and I removed dirt without being cautious. I just skinned the bark and re-airlayered. I hope I didn't screw it up