I thought of sharing this with everyone in case someone was going through a choppy game.

I started the game and right away the game was choppy. I was irritated because my pc exceeded all the recommendation (6G of RAM, 1G video ram, 3.0Ghz processor, etc). I tried adjusting my pc's video settings to get the game going but nothing worked. Finally, I was getting so fed up that as a last resort, I configured the game's graphic settings to the 'highest' on everything and I checked all the boxes. I then closed the game, reset my pc's graphic settings to default, restarted my pc, and restarted the game…..and the choppy graphics were eliminated. I've been playing without any problems ever since.

Hope this helps someone.