Picked up my new 2012 two days ago, didn't have much shudder the first day... second day I had the occasional hard shudder... and today it's almost completely nonexistant. It's so subtle the shudder, it feels like a manual now... and very smooth. 350km's or so, and it feels incredibly smoother than yesterday! I didn't put the car into 'sport' mode until today, and I feel that having the car rev a little bit is necessary in order to break in the transmission and get it working smoothly. Also taking the car on some inclines to get the motor actually working and the gears actually pulling the car rather than level ground has helped the break in process along. I'll update if I feel there are any changes (good or bad). So far though, I am really impressed!
2012 5dr Ti