There is some early chatter in the SEO forums, including WebmasterWorld and some on social media. Some of the tools are showing some fluctuations as well today, where some others have not updated yet. Google announced it is changing the user agent name of the current GoogleBot in December. We knew this was coming when Google launched the new Evergreen GoogleBot. Google didn't change the user agent from Chrome 41 to what it was really running to not cause issues for some who hardcoded scripts for user agent detection. The only way to see which version of Chrome GoogleBot was running was to see what features that GoogleBot can render. A WebmasterWorld thread has some complaints that the number of external links reported in Google Search Console's link report is down by about 50%. Like Google cut out about half of the links they were originally reporting.