bear in mind that every "next' click is a page relaod, which pulls down the same GIF all over again. For those TRIs that post a lot and then have their posts read a lot--which is basically the behavior that got you noticed for TRI inclusion--then the GIF is going to get called often. VERY often.
As to server load times, we're knee deep into a server colo move that will last all summer, so--as mentioned previously--performance is going to get intermittently wiggy for the next few months.
We're using the colo as an excuse/opportunity to upgrade hardware (hello, 64-bit) and fix a bunch of band-aid solutions (goodbye, shared app servers) that have piled up in our infrastructure over the last few years, which means--and I'm quoting our VP of engineering--"stuff if going to break." What that stuff will be, we just don't know yet.
It mat take a while to get it all sorted out (September?), so get ready for a bumpy ride.