The server uses clag that clears about every 10 to 40 seconds but doesn't really help as the server is still very laggy and causes more of a problem then what it fixes, also towny appears to be for donators only. If I had to rank this server i would give it a [6/10] if they lost clag and the server was a bit less laggy I would give it atleast an [8/10].
For example clag was clearing about 10 to 20 entities and there was about a half second delay. If someone logs in or out you experience a lag spike.