3.0 X5 Performance concern

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All,

This will probably seem strange but thought i'd see if anyone else experiences this.

I have a 2001 X5 3.0ltr steptronic with 130,000kms (80,000miles) and the car seems to perform differently at random times. I know these have the adaptive gearbox to suit driving style but it feels more like perfomance and power then it does a shifting pattern.

About 50% of the time if i take off semi aggressively from a set of lights or stop sign the car feels powerful and the acceleration feels touchy, it takes off quickly and there is no real delay in getting going but the other 50% of the time if i put my foot flat it seems to slowly and lethargically take off and only starts to pick up quickly when it gets much higher in the rev range. This the same even when the car is already moving and i accelerate after say turning a corner. Sometimes it feels pokey and other times very very lethargic.

At first i thought it was just me and it was all the same but my wife noticed it while driving the other day also.

Does anyone else experience this?? Is it normal or......?

Thanks,

Mike