Before you change it, could you run some tests? I'd like to see where and why the slow downs are coming in.
Sorry, my edits seems to have been made after your post.
Edit: I have been in contact with AfriMan regarding this and we are busy trying to trouble shoot it. Just wanted to mention it in the thread so other users can see they are not the only ones experiencing the problem.
Edit 2: The interesting thing for me thus far has been that I get different ip addresses for gmail and facebook when it is working 100% and when it is slow. Other users might want to check on this as well.