i have an 09 and i found the FW to rattle a bit when in neutral and off the pedal, when i brought it up to my dealer they brought me out to hear a COP 08 model and I'd say it was 75% louder than mine so I'm guessing the design change in 09's helped but didn't eliminate the sound(rattle).
2016-F82 M4 MW DCT
2013-F10 M5 B&O AMS DP DCT (GONE)
2014-F32 435xi AW 6SP (SOLD)
2006-E90 325i winter ride