Make sure you are in the right gear. It loves to be ragged. It pulls along nicely in any gear, but it only PERFORMS in the right one. If you start flooring it in 3rd....ask yourself whether dropping to 2nd might have given you a better start. Im a naturally lazy driver, so often dont drop a gear in mine. Once I learned to use the gears in it, it flew along a lot better.
Remember that the power is produced up at 6250rpm (and max torque is still high at 5400rpm), so if you start flooring it from 3500rpm, you arent making anywhere near max bhp and you arent in the torquiest area of the rev range. Therefore it is conceivable that other cars would catch you out if you werent in the right gear - losing a couple of seconds on the road is enough to lose out big time. Change on the gear change light so that the next gear is revving higher and you stay in/towards the power band.
If youre doing all that and still think its slow, then you are either very used to it or it has a problem. I wouldnt be too disappointed if a Rover Turbo Coupe beat you - their 0-60 is just over 6 seconds as standard and they fly in a straight line.