Forum lag here, too. I just had a fucky-good time trying to wait for a post to go through. Then I ended up triple posting and had to spend a time to delete them. It felt like myspace.com for a second. NOTE: this isn’t all the time.
Haven’t really noticed a markable difference. Maybe a few seconds lag here and there, but nothing out of the ordinary. Nothing for me to say, “F-this, this site takes too damn long to load!” I’ve waited longer for porn. But then again, who hasn’t?