Q8Driver

I have recently bought a 50 TDI Vorsprung Q8. Can I ask are you guys finding that the gearchange is terribly slow under certain conditions. Its fine under normal driving, but if you slow down for say a roundabout or a junction and then ask for power theres a huge delay and then a sudden surge of power. Its terrible. Just wanting to know if its how the car is or if mines faulty. Ive had it back in at the dealers and they couldnt find anything wrong, just did a reset of the control module and told me to see how I go. 500 miles later the car is still exactly the same. Ive owned 4 other Audi's since 2011 (A5, A7, RS4 and another A7) and none were like this.