I was intrigued by this, because it sounded a bit odd. I think it's a combination of two things. One is the timing belt has to be replaced at 90K or so, which is fairly common but often overlooked by owners, and a belt failure will bend valves on this engine. The second is that Honda apparently spec'd the valve adjustment interval quite a bit longer for the US engine as they did for the same engine in Europe - 105K instead of 30K was one bit I read - and the valves tighten up and in some cases burn the seats.
Definitely something to be aware of.
Brian