From what KK posted, it appears that the short hills end in January (replaced by SE). But heavy sleds are done for SIX MONTHS and twice a week starting in January. So I’m guessing that Asafa’s development (including stiffness?) comes from the power emphasis from the sleds.
But another side to Franno’s training. If you look at splits side-by-side like they have at elitetrack, you see Bolt running .82s…and Asafa running .84s. As Charlie has said many times, the person with the highest MaxV usually wins the race. Is Asafa losing to Usain because Franno doesn’t do 60’s and doesn’t run at MaxV (so in a race, he doesn’t quite have what Usain has)?