Have noticed this for the past wee while in my Ed30 (dsg). Sitting with it in D it doesn't do it (i'm assuming the clutch being enagaged at some level is cancelling it out), however if you knock it into P or N and sit idle on tick over it does it. Whether it be from a cold start, after hooning, regular driving, even giving a wee tap of the throttle doesn't affect.
My friends Bora TDI had a misfire issue and it was a fairly noticable shudder whereas this is like a wee gust of wind catching the car sort of feeling.