It tells me nothing considering the amount of games released within a short period of time. ACIII, Dishonored, BO2, H4 and others, all released fairly close together. Ever consider that people might play more than just Halo?
Honestly right now I dont particularly care what the games population is. You could have 400k one day, the next 80 and the following 300k. BTW it is the holidays too so you might want to factor that in as well...
That being said, I really just have nothing more to say to you as you really dont seem to be interested in differing opinions. The holier than thou attitude its wearing thin. So thankfully this is my last responce as I grow tired of dealing with this stuff.