They're not the real thing. The rating's he uses are "filtered" before they reach the final figure. They become an adjusted rating. One of the adjustments adjusts for the problem Imagele alluded to. This might be wrong to say on a site like this, but I know some of the people involved at ********************, and the product they are about to unveil is apparently awesome. The ratings are on the same scale as Timeform, will make Mark Read's old ratings look like dinosaurs.