Dec 16th 2007 9:40AM
Actually go to www.gamespy.com, check bottom right, it shows you how many people are playing how many FPS games (not rpgs like Warcraft)
CS 1.6 is still vastly more popular than CS:Source, I know this I have played both for a long time.
Quake3 is a lot more popular than Quake4.
People don't automatically just "switch" to new games when they came out, I mean Quake1 which came out over 10 years ago recently had a league in which 63ish clans entered in 6 divisions.