***THIS MAY ONLY RELATE TO PS3***
If anyone thinks it runs like sh*t and are having crashing issues, have you installed the textures from the disc ???
This is in the multiplayer menu, where it says play online - scroll down to options and go in and at the bottom it says INSTALL, it is about 2gb in size and takes approx 5mins !!
Apparently with this being saved on your system it stops the need of taking so much info from the disc (slows the disc down or summat :s) and helps the game run better and stops it from freezing up
and takes some stress off of the blu-ray drive
Hope this helps some people cos i know it did me !!
(unfortunately does sort out the lag issues LOL)