Just adjusted the valves on my 2008 Ridgeline with 102,000 miles. The Intakes were loose about 1/8 turn of the adjuster, while the Exhausts were tight about 1/8 turns. Engine is noticeably quieter after the valve clearance adjustment, which surprised me with such a small change (1/8 turn is about -.0008" - .0010"). I set my intakes to the low end of the spec .008" so they can open up as they wear. I set the Exhausts to the middle of the spec at .012", but knowing that they tighten up as they wear, setting to .013" upper end might be better, if you don't want to do this job too often. I like quiet valves, so I hedged with the mid range. I'm the 3rd owner of my RL, so no telling how the previous owners drove it, but I drive it fairly average, so I'd say Honda's 100,000 mile recommendation on this service is accurate, unless you drive your truck really hard at high RPM for a long time or frequently haul heavy loads, in which case, doing it sooner is probably a good idea. I think the owners manual says to do it only if the valves are noisy, but in my case, the engine was pretty quiet before the adjustment; I noticed it being quieter after the adjustment but I would have never characterized the before sound as "noisy", unless I worked on Honda V6 motors every day and trained my ears to good or bad ones; regardless, the valves definitely needed the adjustment.
I'm posting real world findings to the forum, because the valve adjustment service is VERY expensive, but then the cost of fixing a burnt valve that got too tight from lack of adjustment is even more expensive, so it's a balance, deciding when to do it, for sure. Reading posts from others, saying their exhaust valves were tight after only 50,000 miles, got me nervous that I had waited too long, but that just was not the case for me. I think the Honda engineers knew what they were talking about with their 100,000 mile service recommendation.