Saw this topic and I know it's old but I just wanted to say: search is the most slow from using the site in general.
Search is also desperately in need of upgrade (having the ability to search different forums, subject lines only or all text, etc)
Oh, also images take a while (hours) to show up.
Unrelated to speed but the "image manager" in the post editor doesn't work properly (the size of the box, and the buttons are either too small or draw funny, so you can't use them) in latest Opera, Safari and Firefox for OSX 10.4.8 (Tiger)
