In addition to the internal and phone storage question I raised in my last post, I'd like some clear understanding of the recent apps button in ICS. I've researched this online with various answers. This article seems to be the most detailed and accurate, and still it leaves me a little confused.
From what I gather, even if you hit the home button after being finished with a specific app (for example the browser, camera, Facebook, music player, etc) the app does not actually close. And when you tap the recent apps button (lower right button on the G Nexus and One X) it pulls up a screen tile of what has recently been open (for easy access or to swipe the tile away entirely). From what I gather, people believe that swipping said tile kills the app entirely, but I guess that isn't the case.
Android does this so that you don't have to wait for a recently used app to open again. If I open my task manager right now, I probably have 30 apps on there. If you look at what its doing, its not using any of the cpu, its just sitting there in a sleep mode basically. That way when I go to open that app again, it opens instantly. If I were to close that app out entirely, I would have to wait as it re-opened when I wanted it again. Just because there is an app on your recent list doesn't mean that its active and running.