Strange.. I've found the site to be quite the opposite - stable, fast and responsive. I would be interested to hear how much of a widespread problem the delays are. Certainly the server stats appear to deal with the traffic with ease, so if anything it will have more to do with the connection between your ISP and the server in the States, since it's further to travel for UK users, there's more potential for problems on it's way. Perhaps those experiencing problems can compare the speed to other US websites, to see if it's isolated or not.