Well, flargle, in all fairness you've got a hell of a lot more experience with CX racing than I do, but I'll make a bet with you that inside of 3 years >75% of the pros will be on disc brakes.
Take a look at this World Cup XC race (which is what I meant by 'pro').
http://www.youtube.com/watch?v=Q_OHG...eature=related Is it really so unlike a CX race? Sure, some of the stuff they ride we'd be running, but there's a hell of a lot of similarity....and _no_ canti brakes.