Using 6.1 connecting to Server 2008 R2 Standard performance is quite slow compared to other machines at the same site and other remote support tools. SC process cpu usage is 25%. Found an old forum post that suggesting blanking the guest screen. This does solve the slowness issue but still annoying having to do that and wait for server to catch up. Common thread between that use and my case is a Matrox G200 graphics chip so my guess is some sort of driver issue.
Customer support service by UserEcho