Thanks for that information - very useful.
When I referred to the sharpness of electronic throttles I meant the character of the response generated by pressing the accelerator pedal and wasn't thinking of the mechanics. I have noticed a hesitancy followed by oversharpness in both the S6 and RS6 - whilst you do get used to the 'feel' of the pedal it's not completely natural and seems to be a problem more asociated by large capacity engines. That said it's less notable in our ML63.
Nevertheless interesting to discuss.
Best wishes for 2010,
Robert