If you slo mo Sandra Perkovic, I'll bet that she leads more with the hip than either of these ladies.
I talk to my athletes about being Calm. I don't care for the word Relax, because the body is not truly relaxed as you throw. It is desirable to have a certain amount of muscle tension. So, part of throwing for us is to find the calm spot in your mind. For some it's a cool mountain stream, for some it's kittens and puppies. (I am not kidding) Everyone has that mental distraction that allows you to focus on letting your body do its job. Our procedure (with the same rhythm every time) might be 1. Listen for your name to be called 2. Grab the implement like you mean business 3. From the front of the ring, look where you're going to throw 4. Stride forcefully to the starting position, deep breath 5. CALM 6. Optional is to think about the first movement (position or cue) 7. Explode
These things are so simple, you might say. However, repetition in practice and competition stops one from negative thoughts or getting some form of a Yip.
So the difference between Justin Rodhe's stand throw and rotational throw is 4.84m. How does that compare to other gliders and spinners? It seems like it shows the efficiency of his technique.