It seems like AMD forgot to send us the drivers before release this time, and there could be a reason for that. As we have a look over the release notes, there appears to be no performance improvements noted anywhere this time round. This isn't good news for 3870 owners as while the card is pretty good a lot of us expected some gains from it with its first official driver release.
Performance Improvements Note
We receive the Catalyst drivers before they go up on the AMD website and before the release notes are written. While we don't always get the opportunity to test the particular applications that are mentioned in the release notes we try to cover all our bases by testing Synthetic, Real World, HDR, OpenGL, Direct3D along with AA and AF.
If there is an application improvement that we haven't tested feel free to use the forums and comment on anything you notice.