Wait, you burned through 80% of a set of tires in 6k miles? $1720 in tires....
If you've never driven a performance car before that would be the expected response. If I could get 15,000 miles out of a set of tires on my prior cars that was a miracle. Pilot 4S should last around 10-12K miles before some serious degradation in grip with street use and occasional hits. Romping hard on the car yeah 6,000 miles sounds about right.