That's because most servers are listen servers with crap CPUs on ADSL. Just like every single other game release that starts out with "terrible lag" and then everyone later thinks "thank goodness they finally fixed that crappy netcode, what were they thinking!?" when they hadn't changed anything. Seriously, we have to listen to this complaint with every single FPS MP game release, and people never seem to get a clue. When all the good dedicated start coming in, it'll increase the quality of the server pool significantly.