I tend to agree with the software theory above.
It certainly seemed that my car adjusted itself to my 'style' after 7-800miles.
I drove it quite carefully (under 3,500 in all gears, no speeding or gearbox decelerations) until I felt the engine freeing up and everything running smoothly after which I have gently progressed to working the car as intended.
Wheelspin is still a small problem as is controling the highend pick-up when overtaking but with 1200 on the clock its a superb drive and everything I expected from it.
Still set on economy btw.
Trying very hard not to love it to much as the last one I did that the car was written off by a red light jumper!
