I've also observed that the AI summary on the google search page is incredibly stupid compared to the results in the actual Gemini. The Google search AI is like the dumbest lightest model simply rewording the search results. It will take a random reddit comment, strip it from it's context and present it as absolute fact.
I’ve seen it directly contradict the citation so many times that i disregard the text and just click the citation or scroll past every single time. Just today i caught it making up the date for an event, and the citation had accurate information when clicked through.
It’s super easy to catch on dates and numbers, but it gets other details wrong all the time too. But so many people won’t be double checking the results.