I have heard of that method too, I'm not sure if there are advantages over what I did or not. Although the only difference is that my method includes starting the engine momentarily. I did a good jobI'm happy with how much of the old stuff I actually got out, it's nearly all of it. Can't really get much better, unless I repeated my procedure a few more times.
I actually followed the procedure how the Chilton manual said to do it.