I don't run any dual pivot brakes but will admit that in many cases they can greatly improve breaking performance if the previous brakes were lacking... whoever made a point about the levers having an effect was dead on as sometimes a change in levers can greatly improve braking because of better mechanics in the lever that compliments the brake.

My friend's Bianchi was equipped with a Victory group and single pivot brakes which were only so so until I switched the levers to a pair of older Record levers I had and the braking performance went from blah to stellar.

The Victory levers work just fine on my road bike and are mated to some Zeus titanium centre pulls that have awe inspiring stopping power.

Just upgraded my Proctor road bike to some 600 Tri Colour and installed the single pivot 600 brakes and the stopping power is excellent and this is with older brake pads.