tinyE: Do I need to download the patch or is it included with the original install?

The very beginning of the game sticks you in a camp surrounded by A LOT of orcs which made my FPS take a nasty hit. After each one I killed it got better and by the time I got down to the last two I was running great. My question is, will I be seeing groups that big a lot? If not I can rev up the settings and deal with it, but if the game is constant hordes of baddies I'd better trun off the bells and whistles. Thanks! :D