I hadn't done anything special. It would go over in next lane after turning the signal on. I swear it worked for me more than one time. I was on a 3 lane going in same direction on an interstate, going about 70MPH.
Update: Seems like turning on the signal when the solid line is ON for LTA seems to does it. DRCC activation isn't needed. As soon as you turn the signal on, the LTA solid line goes hollow, and the car starts drifting soon. It may not find the solid line on the other side of the lane it is moving to so you have to be ready to stop the drift.
My quick run to grocery wasn't long enough but I did try it about 4 times around 30MPH. There's definitely a drift, or may be I am just imagining it. I don't think my alignment can be so bad already on both sides though. I suppose the Manual must spell something out on it, but what's fun in that