Even if you get 60 fps average in this beta build doesn't necessarily mean you'll get that high of a frame rate in the SP campaign, you know?
Now I'm not saying that SP performance will somehow be way worse than MP performance - Relatively speaking, Battlefield 3's single player was definitely not harder to run than its MP. If anything, it was actually easier to run fluidly than the MP.
Anyways, what do you guys think will be the case? (If a Crytek employee could give some feedback in here that would be awesome, and would remove all doubt I have about pre ordering the game.)