I've got the same thing, I didn't see Steam add the patch to my system either. According to the patch notes:
*Please note that once you've updated the game, you can confirm it's been installed by going to the Title Screen>Settings>Display. In the lower left corner you should see Version 1.2.0.310 in the lower left-hand corner.
I wonder if the patch notes are wrong or if some how I got a different patch or something.
I haven't seen any improvements if I did get the patch.