Never believe a media sales person. Make your decisions on marketing media buys based on your own data.
I recently changed jobs and went from seeing one side of data to working with a company that works with many other companies, so I see all kinds of data for this industry. The past place I worked would like people to believe that they are the best based on one metric at one point in the process of the service they sell. Because they are good at that.
The truth is that there are other companies out there that are much better at achieving ROI than they are. But you’d never know that unless you had the data to prove it. The sales person will always produce the best data and hide the worst and you have to read between the lines and see what your end game is and if they help you get there.