Interesting reading some of these.
I've had an M3 with DCT, an RS3 with DSG and two C63's with the wet clutch 7G.
With everything turned up to 10 the M3 banged gears home so hard on manual changes, first time I used it in anger I thought I'd broken something

.
It was excellent in manual - the problem I found was that it was sometimes jerky and often selected the wrong gear in auto, for instance when I wanted to get out of a junction quick.
2 software updates didn't resolve the problem.
The RS3 was similar - less jerky in traffic, but particularly in corners when you wanted to get on the power early, if the gearbox was in auto it felt like the car couldn't decide what to do and there was an obvious delay.
The other feature was it occasionally made a nasty noise on cruise - which the dealer said was "normal" but didn't convince me!
Have since heard of several of the S3/RS3 gearboxes go pop.
In a drag race, the DCT/DSG cars will bang through the gears quicker for sure, but for a day to day car I actually prefer the C63 box, just feels smoother.