Single pivots feel sprightly on the climbs.. often making folk say they are really efficient.. and they are,but not when the going gets rough compared to some other designs.
If you think Ibis or Turner pay to use DW as the 2nd best option after single pivot.. like someone said earlier,you are smoking crack. 😆
To be honest,I can think of 30lb+ bikes with dw or maestro that I could nail technical climbs on far easier than my old heckler. Even the superlight would be left for dead regardless of the weight difference.