Got my new Thinkpad T430s in the mail a few days ago, and just installed Battlefield 3 onto it.
At 1280x720, at the lowest possible settings, I'm getting 25-35 FPS on a very hectic game of Caspian Border with 47 other people.
This Intel HD Graphics 4000 is some powerful stuff, especially from a company whose integrated graphics chipsets have always sucked. Can't wait to see what Haswell is capable of. Intel has made entry-level discrete graphics obsolete.