Unfortunately I do not.

Past survey results are hidden in some presentations I've seen, and the latest survey I have full access due to my company paying for it. So I'm not sure it's legal for me to reproduce

The latest survey is here apparently: https://getdx.com/report/ai-assisted-engineering-q4-impact-r....

No idea if signing up gives the full survey for free. We get it through our company paying for DX's services

your google-fu isnt failing. there's simply only a couple large studies on this, and of those, zero that have a useful methodology.

I think there is going to be 2-3 year lag in understanding how llms actually impact developer productivity. There are way too many balls in the air, and anyone claiming specific numbers on productivity increase is likely very very wrong.

For example citing staff engineers as an example will have a bias: they have years of traditional training and are obviously not representative of software engineers in general.

FWIW I only mentioned staff engineers because the survey found staff+ engineers reported the highest time savings. The survey itself had time savings averages for junior (3.9), Mid level (4.3), Senior (4.1) and Staff (4.4).