They originally broke this story in 2010, not 2008. And in this 2012 follow-up story, the author was actually invited to Valve headquarters in Seattle, told all this information in person by Gabe Newell, and then spent the next few days playing with the Steam client and Linux versions of the games while there. Read the article for photos of the Valve staff, the games, and their work environment. The company even hired at least one guy that the author of the article recommended to them last month and asked him for more recommendations this time.
I wonder if it improved any from the last time you used the Mac Steam client... If you find out, would you let us know?