Age of Conan is still at number 5 but it has tons more minutes to go before catching up with anything, and it will never catch WoW for sure.
Here are the minutes so far today for the top 10 games.
1. World of Warcraft - 16,472,670
2. Call of Duty 4: Modern Warfare Multiplayer - 11,925,487
3. Call of Duty 2 Multiplayer - 6,007,069
4. Counter-Strike: Source - 3,363,503
5. Age of Conan: Hyborian Adventures - 2,644,781
6. Battlefield 2 - 2,068,424
7. WarCraft 3: The Frozen Throne - 1,686,269
8. Guild Wars - 1,403,286
9. Wolfenstein: Enemy Territory - 1,321,428
10. Counter-Strike 1.6 - 847,213
And then just for fun here is Crysis on the chart:
54. Crysis - 198,205
It's rank isn't the best but thats still a pretty good number of minutes in just today.