I now know why the forums have been slow for a good part of the last 24 hours, though I haven't pinpointed the cause.
Our "Ultimate Game Room" pages are getting in unprecedented number of hits in a surge of visitors that began at around 7am EST yesterday, died down a little last night, and has picked up again big-time today. If a significant number of people are loading those large images simultaneously, it will affect our bandwidth - and that's what you're experiencing.
My best guess is that the page was featured on some prominent site, but I'm sure it will die down. We had the same kind of spike when Ariel Andrews' "nude" pictures appeared in a similar way, and heavy traffic bogged us down everywhere else as a result.
If anyone knows the source of this feature I'd like to see it! But in the meantime, hang in there, it's a very temporary thing.