nope, I have the 3.0 gasoline and I am not complaining.
I dont expect it to rip up the asphalt especially after performance package e46, but its just fine..
I havent broken in my X yet so I havent had him/her rip, but keeping light on the pedal, I feel plenty of power.

I have had friends tell me not get 3.0 because of lack of power, but I didnt listen since didnt feel like getting a gasoline hungry 4.8 and needed a truck my wife can drive with baby in the car. I am not dissapointed at all.
I am sure some want or require more power, but I think they should get a sports car instead.