Depends on how you mean "slowed down". But the problem never went away for me, and I'm half wondering if other people aren't just experiencing Wishful Thinking Syndrome.
Still getting it several times a day.
Basically after clicking a thread or the submit button, it either works (takes about a second) or it hangs. If it hangs, you get nothing for about 30 seconds, then you'll see your browser's timeout error.
I basically never see anything in between (like a post goes through but it takes 20 seconds, or I click a link and immediately see an error).