Not necessarily. If 25% of the code is written by AI but that code isn't very interesting or difficult, it might not be making the devs 25% more efficient. It could even possibly be more but, either way, these are different metrics.

The benefit doesn't translate 1:1. The generated code has to be read and verified and might require small adaptions. (Partially that can be done by AI as well)

But for me it massively improved all the boilerplate generic work. A lot of those things which are just annoying work, but not interesting.

Then I can focus on the bigger things, on the important parts.