Memory Leaks
I'm not sure what everyone else is experiencing but I started to run task manager in my 2nd monitor to see what the memory usage was with Demigod and as an example my game uses about 150MB of memory on startup and when I looked up during the middle of a LAN match using Hamachi I was up to 800MB and then by the time the match ended I was over 940MB.
I'm sure other people are experiencing issues with game slowdowns but I'm guessing maybe that's why its causing games to go slow and lag shortly after it starts a match. At least that's what we've experienced so far with LAN games.