Taken from konas web site trying to make myself feel better:)
Pivot
Pivot
Anytime you have a pivot in anything, there’s
side-to-side movement, or tolerance. It’s what
allows the pivot to move freely. When you have
pivots that are close together, like in more
complicated multi-pivot designs, the side-to-side
movement in those pivots becomes amplified,
what’s called tolerance stacking. Our 4-Bar system
allows us to keep the pivots as far away from
each other as possible thus minimizing tolerance
stacking. Ultimately, it equates to less lateral flex,
or slop in the rear end, as well a significant
decrease in bearing and bushing wear.