Anyway, happened to find it at the rental store on the way home today and picked it up for a few nights.
The frame rate feels a little smoother (at least in sabotage) and for the most part, there hasn't been any huge changes and I spent some time playing Sabotage with some great rounds before getting trounced by SVER in the last two (one saw us outnumbered and the other we just lost half way through).
If you play as Raven.... stay AWAY from the starting assault rifle, the Hollis A3, and try to stick with picking up a dead enemy's weapon till you upgrade or start using a different Raven weapon. The ATAC is a much more worthy weapon than the Hollis with a fast rate of fire and good stopping power.