What Elizabeth said
Theres little to no torque that low in the rev band. I shift as early as you -- 1800 rpm or so. The car inches forward. At least I'm "winning" the ECOmode though :/.
As well, there just isnt much punch in 2nd until at LEAST 5000-5500. I recall having to merge into a 80km/h intersection from a standstill and that was the time I truly punched it. I actually was surprised at the surge of torque and wheelspin I got in 2, but that was with the gas fully pressed to the floor. That brought a smile to my face too. However, the torque is nowhere near that even at 4000.
However, on the highway, downshifting to 4 and letting the revs climb to 4000-4500, the car accelerates smartly (as Elizabeth puts it). Closer to the surge at 5500 in second, and certainly enough to pass slower traffic.