The leader board is not much use. Since the game is in real time some players adjust thier system clock to make the game play faster and it blows the stats way out of whack. From the numbers that have been shown on the leaderboard from time to time it is pretty clear some people have cracked the game code and just thrown any numbers in there they wanted.

Maybe a second leaderboard that would only measure how many hours the game has been open rather than letting the game just run continously would give more realistic numbers as the current leaderboard is totally unbelievable most of the time.