This.this has to be the first time ever that a Dirt article was the clearest and most comprehensible: http://dirtmag.co.uk/featured/sram-x01-dh-weve-tested-the-future-of-dh-drivetrains-and-it-rules.html
though I suppose Jones wasn't the one who wrote, which might explain it!
I stopped my subscription to Dirt after 3 years of the "Dirt 100" which was obviously just Steve Jone's favorites. Great mag but I couldn't stand his hard on for Orange bikes, anything SRAM and BOS suspension.