A couple of articles I've recently unearthed:

From 2002: But in the end, they're still nothing more than video games

From 2002: Addiction and Gaming

From 2000: RPGPlanet | Editorials | Online Gaming Addiction

I guess the jury's been out and filing back one by one: The new popular MMOPRGs choice of obsessive gaming is ... ta da ... World of Warcraft. Some people still struggle to distribute their time "fairly" among several games (EQ2, EQ, WoW, DAOC, Lineage, CoH, SWG, AO, UO: the permutations are endless). It still remains to be seen if WoW will be indeed the online game to dominate all gamers' households. How will this affect the daily grinding? Some people have noted that there are less timesinks in this game than the old Everquest. And yet I see new people popping up reporting that they have partners who spend 11+ hours on WoW (and yes, I mean new MMOPRG players, not those simply traversing from EQ to WoW).