Originally Posted by Dave Mayer

Discs are too heavy. This level of braking is unnecessary unless you are doing muddy and steep cyclocross racing, or loaded touring in the rain.

For some reason I am getting euro UCI 'cross races in my cable package. This is almost as bad as watching golf, but I did manage to suffer through one race to the end.

Everyone is using cantis. Everyone. Except the last lap, where a rider pulls out a disc-brake equipped bike out of the pit, crosses the line for the win, and raises this fresh bike over his head for the victory photo-op. So I assume discs are good for sponsorship obligations and new bike marketing.