I work for GitHub (although writing in an entirely personal capacity) and the segment in the GitHub Universe Keynote today said that 30% of Python code (written by users with copilot extension active) was written with copilot help.

I don’t know about how the data was gathered, I was not involved, but the segment is 4 minutes in so you can see what the actual announcement claims here: https://youtu.be/etMvd9IKPH4

I have used copilot and watched a colleague writing comments and frequently getting great go code suggestions without loads of edits. I personally am sincerely very impressed.