Gents,
Here is video of the GT on an 09 E92 M3 with DCT. I try to highlight in the video that there is some drone with the system. To my ears, it is most noticeable at 3000 RPM. In the video, you will see that it peaks at about the 2000 RPM limit (at least it replays that way with my current setup - laptop speakers don't do a good job of portraying the sound).
I am going to shoot some more video with a different camera to pull this variable out of the equation. It is quite strange that the video indicates the exact opposite of what I hear in reality and also shows how people might also be more sensitive to drone at certain frequencies.
http://vimeo.com/9457913