CBS is being a moron, cuz when was the last time a lab situation actually accurately reflected real world happenings??
All those "trials" use a hard anchored device, ie, the device will NOT move...how many of you belay this way?? Not many, is my guess...
even if the belayer is leashed down to the ground, he or she is still gonna "give" when the hit comes. Multipitching, i personally don't belay the leader off the anchor but off of my harness and i will essentially be lifted up into the belay...again, very dynamic...
if your gear is so shitty that you can't handle a gri gri, you'd better put a screamer on it and don't fall, bitches!