Well, I'm all about focusing on one thing and doing it right, whenever that is possible. What the author of this piece basically points out is that time-slicing

Well, I'm all about focusing on one thing and doing it right, whenever that is possible. What the author of this piece basically points out is that time-slicing isn't real multi-tasking. It's not parallelism for sure, but whether or not it is "multitasking" seems pretty subjective. Certainly it can give the appearance of two tasks moving forward simultaneously, which is the point.