.A difference of one-half of a second over 1/4 mile? Who cares? The vast majority of people buy cars to drive on city streets and highways, not race tracks.
As others have already mentioned, anyone who paid the premium for that 10.9 second capability would care in the event of a difference of that magnitude.
But there are also those such as myself, who are fans of Tesla and who have track experience with ICE vehicles and want to see Tesla make an even more profound performance statement than they did with the P85D. We also care.
Dare I say, even some of those in the above category of Tesla enthusiasts, but with no track experience, quite possibly also care.