Agreed.
However, he must have not mentioned that Android real multitasking is still more superior in iOS multitasking.
Like, in iPhones, you have to keep certain apps open in foreground in order to keep the task in running, like if you are uploading photos on dropbox, you will have to keep app open in foreground to keep uploading the data. If you switch app, uploading will stop and etc etc.
Like windows phones have the same restriction too, that you have to keep certain apps open in foreground and switching to background (app switch) is going to kill the task being performed.
Android apps can perform any function in background and iOS apps can only perform very limited functions in background.
iOS keeps apps in memory indeed, but the apps cannot perform background functions, like we do it on Androids, like downloading, torrenting, uploading etc all at one time.
Android has split screen multitasking, which is more practical than smooth switching back and forth between various apps in iOS.