In Skyrim the 7660G actually performed better and had more fluid frame rates whereas the HD4000 i7 was noticeably jittery. The AT review was one of the only ones where the HD4000 won the Skyrim benchmark and most had it the other way around and by a comfortable margin.
http://techreport.com/articles.x/22932/10
Note the fluidity with Trinity and the skippy frames of the HD4000
In fact even Llano beats out the HD4000 in that game.
No question about it: Trinity's integrated graphics are fast. They're substantially quicker than even Llano's, and the contest with Intel's solutions is really no contest at all. From a seat-of-the-pants perspective, only the A10-4600M and Radeon HD 7760G are really playable at these settings. Llano is borderline, and the Intel offerings are just too choppy.
Metro2033 and Batman Arkham are really the two games where it seems like the drivers are hurting it more than HD4000 is winning, particularly in a game like Metro2033 where the module actually performs pretty well due to the threaded nature of the game. It might be that Batman prefers one architecture over the other but I wouldn't be surprised to see AMD snatch that back as well with some actual drivers, particularly when you consider that AMD was winning the usually intel-favored games like Starcraft II and pretty much anything DX9 where IPC and overall CPU performance matters more.
I'd expect that gap to only increase but considering it's AMD and it's a new product they'll probably take their sweet ass time with the drivers. Those also show why Anandtech has such a rough time reviewing anything GPU-related as far as gaming goes --GPGPGU the reviews are great. As anyone who's ever tried crossfire/SLi will tell you, the choppiness and low FPS rates matter just as much if not more than the average and max FPS. Taking the average and ignoring the low end doesn't make for thorough benchmarking. There's also image quality to consider and tesselation performance which were, the three of them, completely glossed over in the Trinity review. AT is usually my 3-4th stop after GPUs are released and it's why people head to [H] or Tom's or TR instead of AT when GPUs and APUs come out