I guess this is late but I'll post it for the record anyway
I just got rid of my set of Integritys with 63k miles on them, running at 44psi lately, but they've been run at everything from 30-48. They were pretty much worn into slicks. I got a flat last night and pronounced them dead this morning, replaced them with a set of GY Assurance Comfortreads, which are rated for 80k.