I think you guys are looking at it the wrong way- lower temps followed by warmer are there to trigger development. I don't think development itself is sped up per say as much as the diapose duration where little to no development is going on is shortened.
To the OP- I don't know enough about this to help you. if you search incubation diapose here on the forums you will find a thread with some links and opinion by Chris Anderson.
I'm hoping he or someone else will come along in your thread here with more info on the topic. I'm hatching 10 month veiled eggs as I type this- nearly gave up on them. Babies are coming out really strong though- which kind of suprises me with the lengthy incubation. But they are raring to go and looking strong and alert.
In the distant past I used an incubator set at 82-83 days/low 70s nights and that gave me pretty good incubation times- around usually around 6 to no later than 7 months. I gave that up long ago for the simplicity of putting the eggs in the cabinet under that bathroom sink, with very variable hatch times- longest incubation I have had was 13 month panthers one time back in the latter part of the 90s... Shortest for panthers and veileds were around 5 and a half months- those were using the incubator fluctuating temps I just described, but were exceptional...
