That not an existing aboutme page. You can go to davidcelis' website and verify that it's completely different.
Copilot just picked a random person and linked to their social media accounts. You can search any large quote within that about me on Google and not find a match, it is unique.
The only two examples of generating large sections of copyrighted work are the quake floating point hack and the zen of python. Both those examples are commonly known and copied and talked about, to the point that they have wikipedia pages.
In fact, that's a crucial selling point for the product.
I think the big question is, if copilot ends up copying significant portions a GPL work, not just tiny snippets, is the resulting work infringing, and if so, who is liable?
I have almost no sense of how often code is infringed currently and how often anyone does anything about it. I have a feeling that we live in a world with constant infringement, basically no one cares, and no one does anything about it. And I would assume, the status quo will maintain its current course with this new tool. But again, I'm giving zero factual evidence, it's just a feeling from not seeing our hearing almost any news about open source code infringment.