Been playing with the different modes in Drive Select this week to see if it makes any appreciable difference in either drivability or economy.
The car definitely feels more alive when placed into dynamic, the throttle response is far sharper, and there is more shove into your seat when stepping on the throttle, it does also appear to be a good few % worse in any given scenario for MPG when compared to the economy mode.
Certainly worth activating in VCDS and Hidden Menu, even if it does only give me throttle/engine and steering response (rather than the full suspension, diff, etc that the specced-up cars get).