I don't know what to tell you all. We aren't able to figure out the issue. We have been informed by a member on ScoobyNet that one of the IB owned forum sites works swimmingly in the UK however.
This was told to us yesterday, and I've instructed the people I report to, to find out what it is that's different about that particular sites set up as compared to PF & SN.
Hopefully this investigation yields us some useful results that lead to a solution for your speed issues.
Believe me, if we could flip a switch and make the issues disappear, we surely would.
cheers,
robb