The problems with your argument are:
- We are not sure whether Marissa Mayer was referring to Google's 10.000 employees.
- Taking into account the poor quality of Google's serps in specific sectors until recently. And taking into account that 10.000 highly educated Google employees were doing the evaluation job. I wouldn't consider that as a good PR for the folks at the plex.
Better to balme it on the $10 raters ;-)