S5 coupe, feels skittish/squirmy when the foot goes down

[Rod77]

Hi there, 

So im new to the Audi OC.. 

after having the golf 2.8 V6 4motion and a R32 i have recently changed from the R32 to a 2010 S5 4.2 V8 and have a quick question that i was wondering if you guys/gals could help me with.

So when i put the foot down recently, on a dry road it felt like the car was quite squirmy/skittish..like it was fighting for grip..

I was thinking this was down to either the torque, car trying to find grip or because i'm not used to driving a car where the power is 60-40 to the rear wheels. The tyre's are fairly new and it was a flat straight section of road.

Any help or advice would be greatly appreciated..

Cheers

Rod.