I just tested with Lancer, Yoyo, and one other person, absolutely unplayable as a client connecting to the server. Halo's FPS chart showed 0 the whole time.

I loaded the map as a LAN server, and it ran fine, and I also played a few rounds of stock maps on another server, and it ran fine. Also, my framerate went up to about 10 or so when my connection dropped while in the server. This makes me think that the sync scripts are causing this.

The other guy that was testing was also having the same issue.