Or scouting, or physical ability, or lots of things.....most of the online publications have guys and gals that see the people in person, and they don't just rely on stats. They also talk to scouts from every organization over and over. I'd guess that there is some bias for original thoughts, but it disappears over time. After all, a month or two of data shouldn't change your opinion on someone, if that opinion is based on several years of data, unless there is a clear process change.