There can be a lot of reasons for it being lagging from botters to messy code a messed up database database structure, to something as simple as the server needing a restart.
Though I do feel sorry for the other sites that run on the same server. They must be cursing GPX/GTS by now.
But will see if they figure the lag out after the downtime today.
(I still believe this lag is from them buffering the interactions and then torturing the poor database with tons of interactions at one instant.)
EDIT: I went sniffing around their twitter.
Quote:
The site is currently down as hardware changes are made to our server. This should take no longer than a few hours.
Few hours my behind. That post was made 6hours ago.