squids - decreased by 20%
animals - decreased by 20%
hostile mobs - decreased by 30%
I've also decreased monster spawning frequency, which means that for any given chunk the server will attempt to spawn hostile mobs less often.
From a player perspective these changes probably won't even be particularly noticeable, however when you look at the server as a whole this will mean at least 150 less mobs during the day and at least 400 less mobs at night with a typical number of chunks loaded. This will give a noticeable reduction in CPU usage, especially during busier times, and also reduce 'Nether lag' a little.
