ok so my two cents on the whole thing....i think that obviosly they can get a better edge on a race ski, and also, race skis are made for turning as well, not just holding edges.
but the whole thing with the magne is that as the edges dull, they can still hold on ice and stuff. so maybe they arnt the greatest, but compaired to a dull edge on a regular ski, the magne traction ski will hold better