I agree that 0-60 doesn't mean much in the real world, to really get a car going off the line can sometimes be a brutal experience, especially in cars with launch control and semi-automatic transmissions (BMW M5, GTR, etc.)
On the other hand, I like to know that when I spend my money the car is "fast enough" compared to its competition. I think horsepower, torque and power/wt is more important. My car has 440 hp from a naturally aspirated 4.7 L V8, I think that's amazing. Unless it weights as much as a semi-trailer, I know it's fast enough.
I don't think anyone is stupid enough to buy a car for 0-60 only, it is a crude measurement and doesn't tell you anything about the car, other than bragging rights?
Why do car manufacturers quote? Purely for marketing. To make a buyer feel good, so he can feel that his car is "faster" than yours, but you would have to be pretty insecure if that is why you bought the car.
Cars are emotional investments. I bought the Maserati because I "love" it, it was the styling, sound and beauty of the car. Someone mentioned Jaguar, and for me, the Jag didn't match up in those 3 elements. I don't care if its 0-60 is faster.
With launch control, AWD, and computer technology, 0-60 times will drop even more (sub 3 sec in the Turbo S), but that will tell me even less about the "experience" of the car.
How many of us could have had a GT-R, or an Ariel Atom? We choose our Maseratis and Astons for a reason.