LessWrong running very slow?

LessWrong pages are taking a long time to load. Today they are especially bad, to the point where if I make a comment the page times out before it is posted. Is this true for other people? Do those who run the site know the cause? Can it be fixed?

EDIT: Confirmed: It’s not just me, it’s probably everyone.

EDIT2: I also apologise for my appalling grammar in the title.