Don't know if anyone has already posted about this. At any rate, I just did a Google search in which a box appeared on the results page, on the right-hand side, asking how satisfied I was with the results. Here is exactly what it said:
How satisfied are you with these results?
Very satisfied
Somewhat satisfied
Neither satisfied nor dissatisfied
Somewhat dissatisfied
Very dissatisfied
This satisfaction survey box appeared at the same time as the first-page organic results, before I clicked anything. There was no Knowledge Graph or any ads on the page, only the organic results and the satisfaction survey box. I didn't click anything in either the results or the satisfaction survey box but just killed the page instead, so don't know what would happen if I did click something.