Sorry, Pleu, not only are you correct, you are also wrong. Stat compare does not qualify its statements, so find count should be all caches found, not just some of them. While average difficulty would only include caches that have a difficulty rating, finds should include all caches that are findable.
The way around that is to state on the page that lab caches are not included. (the better way around is to construct a different query for that stat so that it actually matches what it says)