When you hear a saleperson...including data list providers...state we have the "BEST" of something, you should ask the question "Why?" and ask them to explain.
It may just be me, but there's a red flag that is raised whenever I hear "Biggest, Best, Brightest, etc...." and other superlatives used when touting a product or service. I simply want to reply "PROVE IT!" Can they prove it? Who defines best?