OK, I am going to chime in. First of all, all U.S. C-14's (yes, even California models) are specified by Kawasaki to perform the valve clearance inspection at 15,000 miles (24,000 kilometers). Every where else in the world, that valve inspect interval is at 26,000 miles (42,000 kilometers). That your dealers didn't recognize this would be a warning alarm for me.
Secondly, I am worthless and weak and easily swayed by nice riding weather, and I rationalized putting off my check because of others reported findings and the above interval discrepancy, until 23,500 miles. I am in the middle of it right now. Every single one of valves was on the tight side of the specification, or .001" out of spec to the tight side. Every one will be adjusted toward nominal. Most others here have found very little to worry about during their checks, but most have also noted the valves tend to the tight side.
If yours are all near mid-spec nominal, as shown in your map, that is very cool and not unprecedented. In my case, waiting until 37,000 miles wouldn't have resulted in any real valve noise, but it very well could of led to burned valves.