StrongChE, I'm not saying your totally wrong, but Bossman said he was struggling with the last 2 mm. That would require the use of something much thinner than the average belt, unless you're doing a type of overcrush at that point. I have both of Brookfield's books btw, great stuff.
b-fold, it definately would affect your farmers. Its based on forced adaptation, and kills your strength for a while. For a few weeks(at least) your hands are definately overtrained and hurting. But, its ultimately for the best. Also, the program is very specific, so if you do other grip work during the program you could screw with the overall effectiveness. So, your other training would need to be altered or due to the effects from the program or the effects to the program. My hands have been hurting a lot during cleans, heavy shrugs, and some other stuff.