....I think that Komenda is spot-on in both his posts - A performance car 'driver' doesn't need so many gears - It's not as if there are many places where we can legally drive at speeds where more top gears would be useful. Also it's pure marketing hype: Mine's got more gears than yours crap!
I was taught on my high performance road course to use the gears MORE and not less, so that the car is always in an optimum state for either instant acceleration or more effective engine braking, whichever is needed first being more instantly at hand.
It's like all the rubbish being publicised about the importance of maintaining correct tyre pressures - It shouldn't be about improving mpg and supposed emissions but should be about the car being safer through better grip etc!!