Air Rabbit,
From my own personal experience, it took some "adjustment" to the landing technique when our fleet was retro fitted with winglets. Get the flare just right and everything was great. But a little too much aggression in the flare, flaps 30 with a slight tail wind element and weight in the region of 55 tons meant you were eating up a hell of a lot of runway (Two guys got caught out on short fields and had to go around as a result).
There was a lot of discussion in the crew room on how best to adjust the technique as the FCTM doesn't stipulate a technique that differentiates between winglet and non winglet aircraft.
But it is fair to say that the winglets do add a significant amount of efficiency to the wing and (early) adjustments in power settings dependant upon your weight, flap setting and landing distance available can prove prudent.
Safe Landings!