I'm like you. I'd say my productivity improved by 5-10%: Claude can make surprinsgly good code edits. For these, my subjective feeling is that claude does in 30 min what I'd have dont in one hour. It's a net gain. Now, my job is about communicating, understanding problems, learning, etc. So my overall productivity is not dramatically changing, but for things related to code, it's a net 5-10%
Two things I solidly recommend it for are helper scripts and test code. Writing boilerplate tests is so much easier with it. I recently vibe coded an entire text-ui frontend to perforce, similar to tig for git, and it took about 2 hours. Yeah, I'm not ready to use it for our driver code yet but I would use it to check my work.
The teams that have embraced AI in their worlflow have not increased their output compared with they ones that don't use it.