Not sure when "peak time" starts/ends, but as of this moment ( 6:50pm on a Monday) i'm counting..
US Server Pop:
Full 1
Very Heavy 2
Heavy 26
Standard 91
Light 3
Sure it went down since the holidays... but not bad IMO.. Seems like this game is doing fine.
Also i might be wrong, but i heard that they raised the server caps some time ago, could account for servers looking less full...
OR THE SKY IS FALLING AND THIS GAME IS FAILING HARD!!!