It is just wrong for Apple to put a two finger forward/back swipe into Safari and not make it more system wide, at least for core apps, and like Full-Screen, something developers can put into their app.
I'm browsing the App Store or the iTunes store, or a number of other pieces of software like iPhoto and I want to go back, I try to two finger swipe only to realize I'm not in Safari.
In iPhoto sure you can navigate photos, but say you drill down into a roll or event and want to go back to the prior screen, a two finger swipe should do that. And definitely when browsing the iTS, Mac and iOS app stores.
I'm browsing the App Store or the iTunes store, or a number of other pieces of software like iPhoto and I want to go back, I try to two finger swipe only to realize I'm not in Safari.
In iPhoto sure you can navigate photos, but say you drill down into a roll or event and want to go back to the prior screen, a two finger swipe should do that. And definitely when browsing the iTS, Mac and iOS app stores.