I know where you are going with that but app switching is a bit too simplistic as well.
Applications can start up at opportunistic times based on usage, push notifications, timers, other tasks that are running at the same time that are related and etc. App Switching implies that its a bit of a dumb switch, but there is many many scenarios where it is actually multitasking. Not necessarily in the traditional sense though
Of course. What we consider multitasking in a pc environment doesn't quite translate on mobile platforms. If mobile phones did multitask in that manner battery impact would be huge. We're basically talking freeze/thaw tasking.