Is your wordpress admin slow? Do you run a multisite? On a server that uses NAT?
The problem is that the admin-panel tries to connect to it self, and if you use NAT the server can´t reach it self, so it has to time out each time you load a new page.
To solve this, just add you domain to the hosts file (/etc/hosts for linux and c:\windows\system32\drivers\etc\hosts for windows).
127.0.0.1 localhost http://www.yourdomain.com
127.0.0.1 localhost yourdomain.com
If you do not have access to your hosts file, just remove the admin panel. For mor information, visist http://codex.wordpress.org/User:Westi/Hosting_WordPress_Behind_NAT