I loaded up Crysis and went through that area. Mine looked a little different due to having Ultra settings, but it didn't look much different than that as far as all the little white areas between leaves.
I believe this may just be the way Crysis does look. As I mentioned before, the only way to clean up foilage in games is to use supersampling AA, which Nvidia doesn't support officially, and Crysis doesn't allow regardless. You'll likely just have to live with it.
However, if it does look like there are a lot of white dots on images that shouldn't have white dots, especially if it grows as it's on, it may be a result of a bad card.