You both make good points. There are so many varibles that a blanket statement either way will not work. So much depends on the weight of the tractor, the weight of the load, the experience of the operator, the slope, are you on grass or smooth dirt or a rock and root field all hidden by brush and on and on.
If you are going to use a rig like beenthere has make sure that the top link is in the bottom hole on the tractor so it angles down towards the rear axle or below it. You can see this clearly on his picture of the old set-up. This will direct the pull from the load at or below the axle, or at least as low as you can get it which is the safest position.
Try to start out where it is flat and smooth going.
BE CAREFUL, GO SLOW, WATCH WHAT IS HAPPENING, LEARN