No
The Span is not effectively increased, that increase in Aspect Ratio would harm the performance of the wing itself, increasing drag. That is why the Winglet is canted steeply, the newly captured lift is not based on chord, but the pounding it takes from the displaced Vortex. Think Vortex Generator in reverse. Picture a VG, then picture the flow going backwards, "collecting" on the VG and providing lift. Zero Fuel Weight of course is increased, but the net is a positive product from the Dynamics of Flight.
(Plus, they look marvelous)
Airfoilmod