"since iOS was not built from top-to-bottom for multi-tasking functionality, you have to address what continues to happen in the background as the user leaves app and you’re app has to scurry and get everything ready in within a short period of time, or iOS will completely shut it out"
This is just patently false. Multitasking was not an afterthought in this UNIX based OS, the absurdity of that claim reveals the thickness of the author's bias. This compromise was made to save battery life as well as to make sure users are aware of what their device is doing at any given moment.
There's a lot of other obviously stupid claims in there too, I'll leave those as an exercise for the reader.