Check the minutes per week played, though. Even though CS and CS:S are at 9 and 10, CS players still play more per week overall than Sims players do, even though there are more Sims players on average.
CS:S actually seems to be played more minutes per week than COD4 is.
It's interesting for me to see that there are no strategy games on Nielssen's list... Not even StarCraft or WarCraft III. For some reason I always thought that StarCraft would be more popular/played than Diablo 2.
A quick comment on the article itself: I think it's important to provide sources for news articles, i.e. link to the document containing this information on Nielsen's site.
I think one of the best places to see which games are currently being played a lot is at
http://www.xfire.com/
Xfire's stats correlate well on the top 2 games but I think too few Halo and Sims players are Xfire subscribers.
I've never actually tried WoW. For some reason MMORPGs just don't really hold my interest. I played Guild Wars for a while and I looked at videos of WoW but in the end I prefer single player games or at best games like Left 4 Dead.
I gave the 10-day WoW trial a whirl and while it was fun, I could put the game down at the end of the 10 days and not be remotely tempted to subscribe. It's not just the concept of subscribing to a game that puts me off, but the sheer amount of time it takes to achieve anything.
And fishing and cooking... Seriously?!
Guild Wars I enjoyed but the pace of the game can be a bit slow sometimes. MMOs lose out on the action-packed combat ARPGs like Diablo 2, Dungeon Siege and Titan Quest can offer due to infrastructure limitations. Dungeon Runners tries to be an online ARPG, but for a South African with a 400+ms ping it's torture to play.
Anyway, that was wildly off-topic...
call of duty 4 really was worth the buy- playing it one could actually feel the combat like you were almost there, i really loved it...it was very good indeed
QFT