how are they correct in comparison, ok Lotro I checked there forum is linked to site so therefore you can conclude that it is a good number to show, same with warhammer, now go and do the same for the forum site for age of conan, you get nothing does not have any info.
Me I dont go to a main page for some games cause there main page lacks information, go to AoC main site, not much there, now go to forums, multiple threads of 200k+ posts and 400k+ posts, Warhammer having a good amount and Lotro having the least(game out the longest)
In Lotro defense though, looking at all the different forums they have most have a page-3 of all posted on todays date, while warhmmer has an average half a page, and AoC having about a page-2.
Quadcast is a horrible way to dictate a games population there was a similar thread about this before out of which game had more players between, Vangaurd and EvE...Vangaurd was considered more players, cause they had more views on site, WELL...that was cause people where looking to find new patch info, and trials released, go to site sign up, well there is a view for each page that person goes through...look at which game is thriving between those 2.
I should not have to link these sites, you have hands and a keyboard, you can visit them yourselves if you wish.
And also sounds like you are a little bias toward WaR
IMO out of the 3 if you can get into it LoTRo has most to offer, I play al l3 on and off, play WaR for PvP fix, LoTRo for great story and heavy group emphasis, and AoC just to kill people.