He's right, you shouldn't lie and when you do lie: you should not do the damn stupid thing and point everyone to the evidence that proves you are either lying or have not seen it yourself. You never know when someone with too much time on their hands(like me) might actually bother to read it(like I did).
Rule 1 of lists: check what order the list is being displayed in. This isn't alphabetical, nor is it date each member joined. It's activity.
Rule 2 of lists: READ the whole damn thing, yes each and every page(31 at the time of writing) in case a factual curve ball gets thrown.
What will mislead people about this list is that there are grey(offline) and blue(online) entries among the green(in-game) ones. Do not be fooled. I can't say for sure why this is, but my best assumption is that these are people who were recently in-game but either went offline or stopped playing. Their positional status has not updated with their colour-coded status.
The first 3 pages consist almost entirely of players in-game. This drops off completely at page 4: at time of writing there were NO in-game members beyond page 4. This changed at page 11, where the bottom half was all offline. But beyond page 11, there are no members in-game or online at all.
The sample being used is just 3 pages, out of 11 and a half pages of online members and 31 pages in total with most people offline. This sample has also been taken on the day Modern Warfare 2 became available on Steam: meaning of course anyone that bought it is going to be online playing it. This is important because it's the 3 pages of in-game players that matter.
I counted who was playing Modern Warfare 2 and compared it with the numbers that were in-game overall(by taking the numbers at the top of the page and subtracting the MW2 players I counted at the time and the offline/online members). There were 40 players in MW2 at the time of writing this, on those 3 pages of in-game players, out of 129.
40-129, this number on the day Modern Warfare 2 is released. The day is important because people in-game playing on other things(and we don't know how many Online people are playing non-Steam games while logged in) are not the right sample to compare: it gives us an indication of how many in the group are playing those games now, not who purchased them. Those who didn't purchase Modern Warfare 2 do not have an incentive to play a Steam game today, whilst those who did buy it do have an incentive: a new game.