Bullshit, every serious wow player I've ever worked with spent all day browsing wow forums and wowhead researching loot drop rates and strategies. You'd be better off hiring junkies because there aren't many crack and heroin forums to waste time on.
Truth.
Was working at an industrial fabrication plant for a while, a few of the heavy machines ran off of computers and were connected to the internet. Mostly to receive new blueprints and such via e-mail, but also so they could be remotely diagnosed (being damn big, complex and expensive machines).
One night we came to a full stop because the guy running the machine was on the WoW forums and crashed the computer. We didn't get started up again until it was almost time for the shift change. The day managers were beyond pissed, though I think they thought he had actually tried to install and play the game on the machine (which would have been hilarious, this huge, loud piece of heavy machinery playing WoW).