"Turning our settings down to medium, and thereby reverting to DX10 functionality, Ivy Bridge picks up some performance. 26fps still isn't good enough to reach the 30fps mark"
26 fps at medium quality and 2/3 resolution isn't playable... Yes, one day, an APU will be enough, but the developer of this game most certainly did not target laptops when designing the game.
Regarding the Mac argument: it's completely irrelevant. Today, most games are not played on PC, consoles or handhelds. They are played on smartphones. The main reason is that there are more smartphones than anything else, people always have them with them, and because most people only do "casual gaming", which have approx zero hardware requirement.
Does this means that console gaming is/will be irrelevant? No. Because people buy consoles for games that are not available on more limited platforms, and developers sell these games.
This is the same with PC gaming. As I said before PC gaming does not mean "games that you can play on any platform but you choose to play on your PC". That would be just gaming. Thus, is is not farmville or angry birds or candy crush. That's casual gaming, and it's pretty much irrelevant for PCs: these games are not developed with PCs in mind, and PCs are not bought to play these.
PC gaming consists consist of the same type of games than consoles (most of them are console ports), and there is no reason that an EA or an ubisoft survey would turn much different from the steam one, ie a majority of desktops. (And it doesn't really matter if most people have notebooks: most people do not play games other than the casual category).