That's good if that's how it works, I have never used it but I just read the article which I guess is a misrepresentation or poorly written?
edit: I guess this DOES need updating unless it is just pertaining to the updates part
Using Offline Mode on a PC.
Please follow the instructions below to configure Offline Mode on your PC:
Start Steam online - make sure the Remember my password box on the login window is checked
Verify that all game files are completely updated - you can see the update status for a game under the Library section (when the game shows as 100% - Ready it is ready to be played in Offline Mode)
Launch the game you would like to play offline to verify that there are no further updates to download - shut down the game and return to Steam once you have confirmed that the game can be played
Go to Steam > Settings to ensure the Don't save account credentials on this computer option is not selected
From the main Steam window, go to the Steam menu and select Go Offline
Click Restart in Offline Mode to restart Steam in Offline Mode
edit: I guess this DOES need updating unless it is just pertaining to the updates part