The population has increased significantly...but to think to see red servers is ignoring a fact..you have to pay 14.99 a month to play the game.
I still see a bunch of players around but servers won't be flooded on day one. To new people many wait to see how the game is from sources before getting into the contract. Of course many who have played it, known it's good, but the hard part is getting new buyers. Even with the free month, someone has to know they're going to play the game for a while before investing time and money into it.
Not to mention, I don't know about anyone else, but this week was crazy for me, couldn't play Sunday or Monday because of tests..I'm sure players were spread out on playing times like this too.
So if you don't see yellow or red servers, it doesn't mean anything but the number of players logged on at that time...factors like other things to do, etc affect this.
Also, I know that some people are getting it late. A friend of mine preordered, and a frew friends of his, but the store is not getting it in until today..atleast he hopes. They're pretty late huh? So fret not, this game ownz, and there is nothing better..in terms of quality, service, variety, and fun.
I hate playing during weeks, because it means I have to get off..