I find it hard to believe you encounter that many high demand errors on frost. If you are repeatedly hitting refresh, then sure, you'll add to the load on the server and everyone else on frost will get that alert. I have a board on frost and hardly ever encounter a high demand error. I am on your board right now and have moved around to different areas without once hitting any high demand alerts.
Are you having pages time out or are you actually seeing our high demand please wait a fewminutes and try again page? I loaded pages and a thread as fast as any other board on the network. Do you have a firewall or something that might be interfering with the way your browser gets information from the network?