Yes, you are getting the chatter due to the fact that the fork flexes first under braking, then pulls on the brake cable and produces even more pull on the pads. This is compounded by running low tire pressures, which adds to the amount of grip the front tire is getting on the ground. De-tuning the front brake is a good starting point....pad toe, clean rim surface and gentle hand pressure will help but not eliminate the issue.
In the Zinn article one solution is going to a mini-V brake model of brake that will eliminate the hanger under the stem. Another way to go is to replace the fork with a stouter one, or one that has a crown mounted brake stop. Both of these are features on the new Moots CX fork. We are due to have them on the site within a couple of weeks and be able to offer them for sale.
I have run a traditional canti for my 20 years of racing and riding Cyclocross bike and really don't encounter chatter that much. When my pads are new there is some, or if I've gotten glue on the braking surface.... but once then "run in" it goes away. I prefer the wide canti for its simplicity, mud clearance and well, I'm just old school. I'm of the thought that brakes on a cross bike are for scrubbing speed, not skidding. We don't get a ton of mud in Colorado, but when we do it's the clay type and I like the clearance the wide canti offers.
Let us know how it goes.