I am not doubting 95% acceptance rate all. I've pure vibecoded many toy projects myself.
> in line with what they would have written,
point i am making is that they didn't know what they would've written. they had a rough overall idea but details were being accepted on the fly. They were trying out bunch of things and see what looks good based on a rough idea of what output should be.
In a real world project you are not both product owner and coder.
To be clear I did not have a 95% acceptance rate. I'm saying that in the final published repo, 95% of the lines of code were written by AI, not by me. I discarded and refactored code along the way many times, but I did that by also using the AI. My end goal was to keep my hands off the code as much as possible and get better at describing exactly what I wanted from the AI.
If they are saying the code in this project was in line with what they would have written, I lean towards trusting their assessment.