Pretty odd. It's absolutely flying for me from home on dialup. In every regard. But I'm on my way to the office where I can more effectively get onto the servers and see what's up with them.
If I find that we're getting clobbered, expect some minor features to get disabled, like auto-refresh of boards and favorites.
As Matt said, our traffic levels have grown by 20-30% practically overnight, and traffic levels were already very high. But I was pretty sure I'd determined that we could handle 50% more on our current infrastructure and that I wouldn't need to order new equipment (a replacement db server, more than anything else) until we were about 20% more loaded.
In any event, I'll do what I can to help slowness problems people are seeing. And I expect I can get quite a bit accomplished through tweaking.