I never learned how to do that, 'bump' start a car. I had a stick for 6 years and never needed to, so I never learned how. When I got it, it was only 3 months old.
Maybe I'm weird this way, but I think it's unnatural to have that tiptronic technology in an automatic. I would be concerned that I might cause damage if I use it too much or incorrectly. I know it's not a new technology and have never heard of causing problems with the car by using it, but I think I would only use it in extreme situations.
I just know if I ever do use it in winter, my left foot is going to be pounding the floor, looking for the clutch.