Seriously though, at launch, leveling was 100x slower than it is now. Took me at least 6 months (I think... thereabouts) to get to 60, and I played avidly (although I also had a fulltime job).
Also, the author clearly didn't understand blizzard games, or how MMORPG gaming works in general... relevant quotes:
"In fact, Glassdoor wouldn't even be around if it weren't for StarCraft's older, sister game, World of Warcraft, he tells us." (seriously?)
"achieving the highest score in WoW"