I think what Jack was trying to say is that the tires did not "fall off" like the ones they ran here last year. The enigne builders trying to get max horsepower and speed out of the motors were setting them up based on last year's tire which had the cars off the throttle more as the tires wore, and also the race last year was 27 miles shorter too.
Not that it was all Goodyear's fault but a combination of things.
Why is it when Jack says something, people pile on him like he has just ran over their dog, then to spite you he backs up and does it again?