Lamar, if you're talking about Ubuntu, the secret superuser is still root it is just not given a password. You can get around this by editing some config files.
I'm not sure if "locking down 600 settings" is a good thing. Now, I won't profess to be a Windows' Admin and I'm definitely Unix biased, but I really believe that for an OS to be completely secure, the administrators need to know what is going on.
If something goes wrong on one of the servers, I can pop a terminal window, read the log files and find the problem. i can quickly see if someone is trying to brute force attack my machines and what software is trying to get root access.
If someone can tell me why locking down settings even from administrators is a good thing, please do. If I'm totally reading that article in the wrong tone, please let me know. Like I said - Unix biased here.