Thanks for you kind word and for asking this great question. I have to admit that the claim is more for marketing purpose to make it look impressive. The truth is that we tested the design with a small group of folks, including myself, students, a career coach and friends. We use this design during our job searches and we have landed interviews/offers from the companies listed in the logo clouds. It works for a small sample size of us, so we include the logos up there to enhance its credibility that it at least has proven to work for some companies out there.