I think there is something to the higher weight, less mobility thing, but to me that isn't the major thing that makes Jackson's riding different. The biggest thing I see is Jackson's corner speed on steep terrain, which I put (in part) down to his light weight allowing him to brake later and slow himself down for corners more easily than a heavier rider. Jackson seems to be able to gap into sections, clearing over bumps and holes, and then slow himself down on a dime. A heavier rider like Loic or Minnaar wouldn't be able to brake enough for...