This is probably worth clarifying based on all the Battlefield 3 patch news flying around at the moment, ours included. The patch just released is primarily for PC players only. While it did contain some server-side adjustments that effect all platforms, the majority of the changes are client-side only, meaning they effect the console or PC on which they are installed. Given that the Xbox 360 and PS3 versions of the patch for BF3 (ie, the client-side versions) are currently undergoing certification with Microsoft and Sony respectively, they are not yet available. Unfortunately, DICE have not been able to give a timeframe on when they might be released.
The patch that Xbox 360 players may have been prompted to download recently is from Microsoft only, not DICE. The Microsoft update does not change anything in-game.