Personally, I don't have any issues with carrydown in my center, maybe the different opinions about carrydown are based in whole with specific centers and their oiling patterns. The center I frequent oils 38' buffing out to 45', with quite a bit of volume concentrated in the center (10 to 10 board) and on this pattern towards the end of the last game carrydown is evident and thats when the Shift shines.
Just my opinion,
--------------------
Pat Patterson