Depends for me, and not on the browser (between FF and IE at home, with Safari at work) and not on the connection (FiOS at home, ginormous connection at work), but seemingly on random times of the day. Most of the time, it's fine (1-2 seconds on the load), but at other times, it can be most of a minute. Fred said it sounded like the boards were getting pounded now and then, which would seem to be consistent with my experience.