i have not test ridden this board, but interested in hearing that this board seems to improve edge performance in ice.
my thoughts on how it works; a serrated edge acts more effectively when slicing through ice/crud as opposed to a smooth edge, because the high points cut an initial opening then followed through with the remainder of the edge, until the next high point of the serrated edge follows through. there is also more effective edge as killclimbz points out, more edge surface working though the snow. the magne-traction should probably perform better as conditions get worse in terms of ice/crud.
killclimbz, you say it performs like a longer board, do you suppose the loss of shape or arc due to waves be the reason?