It's still busy for about 30 seconds. But not a problem. It does not delay page updates.
Can you try it in Chrome to see if it's your FF browser?
Are you seeing the same delays using the Plesk control panel?
Try clearing your cookies for the O2 forum. I might remove StatCounter from the O2 site if this persists.
Update: I removed the StatCounter code from the O2 forum. Let me know if that helps and acts like the RaspberryBASIC.org forum.