Whether or not it's "noise" might depend on if you think Chains of Thought are causally relevant? I liked these pieces if you want to read more about CoT / O1:
That sounds like an upper bar for any actual change bearing in mind (i) some of the referral drop will come from people happily still using Google but getting more of their answers from Google's AI slop at the top of the results page and less from clicking through to corporate blogs and (ii) YC companies tend towards targeting early tech adopters