i also have been having off and on problems with the site being incredibly slow the last week or so, i just hadn't said anything. i normally just get frustrated with it, and go someplace else for a while until it works ok again.
It's the morning, so the site is fast, but in the evening, god, it's slow!, doesn't mean it's all the sites David has, but I guess the shared server is in heavy use, that's what I believe.