Everyone's experience is different because there are so many jumps in the path and limits all along the path. Other users on your machine can cause your site to be slower than it would normally be.
Even worse, you could be the reason why everyone else is slow on your machine.
If you were to tell us what numbers you're seeing and give us a link on your site(s) to check we can tell you what our experience is. (Every server at dreamhost may perform differently).
Hope this helps.