Been playing with this the last few days. I found that the experienced driver method of dealing with hills doesn't work. Try to bare with me as this is hard to explain.
I tried leaving on a hill with the usual blip of the throttle and a somewhat aggressive lift of the clutch like I have done for years when driving a manual. Almost stalled the engine.
Then I tried leaving as though I was on flat ground. A slight touch on the throttle and a slow gradual lift of the clutch. Pulled away like butter.
It seems as though us experienced manual drivers are just too fast for the system. I know it sounds crazy, but try pulling gently away as soon as the light changes. No anticipation of the HSA release point. No attempt to avoid rolling back. Just a normal flat ground in traffic low rpm launch. Let the torque get the car rolling and I think you will notice it as being less intrusive.
Delivered 21 Jan 2013