So I've been using IE all day and I didn't have a problem.
Not 5 minutes ago, I used Chrome to reply the the Consolidate Gun Control thread and it was a nightmare. At one point it took over a minute to display the 6 words I had typed.
I'm currently suspecting Chrome is the issue. I haven't noticed the problem on other sites, though I don't post on many other sites.
And I'm using Chrome currently and noticing the issue again - though not as bad as earlier.