Just had my valves checked for the first time at 28,640 miles. The results in inches were:
Exhaust:
.008 .008 .009 .009 .009 .009 .009 .009
Intake:
.0065 .006 .006 .006 .006 .006 .006 .006
I was surprised that all were relatively center. I might do this again at 60,000 weather it needs it or not.