No that's not the same subject. Ford intentionally makes a Duratec hold it's RPMs for a second and lowers them slowly to control emissions when you take your foot off the throttle when DRIVING the car. It's called throttle hang and is designed into the system.
Your problem sounds like something else and I wouldn't attempt to do what the FAQ says....
Good luck.
I'd take it back to mechanic and have him check again.
