Most accelerator pedals have some sort of "slop" in the beginning. It's there on purpose to guarantee that the pedal can fully return to idle.

Maybe this guy just isn't used to a drive-by-wire throttle setup? He keeps mentioning the "cable adjustment" on his Bimmer. DBW throttle's don't have cables and ALWAYS have a tiny delay in throttle response due to the ECU checking things and issuing the command to the throttle actuator. Most people never notice. I'm not one of those people, I can tell when I drive a DBW vehicle (my Honda is a DBW throttle setup). It doesn't irritate me, but you have to have a reasonable expectation of how it's going to behave.

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Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Gone and wanting to forget:
1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]