I just had the update this week, and I feel a significant improvement. Much better throttle response off the line and at low speed. I go through a traffic circle every day, and it will be a much less stressful process from now on. It was tough to be smooth before the update, now it feels fine.
Overall, this makes the car much more enjoyable to drive. Now, if they could just make the steering feel more like BMWs used to feel.....
2008 E90 M3
2000 328i sedan (UUC suspension - still the favorite)
2012 Mini Cooper (wife's)
1991 325iX (sold - gone but not forgotten!)
2011 X3 (Performance Center delivery done May '11)