Originally Posted by cyccommute
There is no moment of angular momentum that could be imparted to the pannier load because the pannier sits over the pivot point.
I don't know which is better front or rear ( I always use rear because it is easier) but I will disagree with this quote. The pivot point for a pitch-over when braking hard is the ground contact with the front tire not the axle. Low rider panniers do reduce the angular momentum compared to say a handlebar bag but it is still worse than a rear mounted load.
Now if you are talking about hitting log or hole off-road that stops your wheel without braking then the pivot point will be the axle and your statement will be true.
Craig