If you see an error in a Knowledge Panel (the box on the right-hand side), look for the "Feedback / More info" link at the bottom of the box and then you can click next to a fact to report a problem. People do review those reports, and that's the fastest way to report an issue.
This isn't a real-time complaint.
So it was a manual fix that corrected the issue? I guess that makes since given that her Wikipedia entry didn't have the standardized birthdate listing (at least in the first line) until today (http://en.wikipedia.org/w/index.php?title=Amy_Wilentz&ol...). Would that fix alone been enough to fix her snippet?
As Amy noted in her piece: "My Wikipedia entry, oddly, was put up by Cousin Joel, who has a genealogy obsession .... Joel began the entry with my connection to my father, and immediately mentioned my father’s birthdate and the date of his death."