Actually, flexing the new inside leg tilts the whole body downhill so that it starts to move across the skis. So does extending the new outside leg by lifting the uphill half of the skier. These leg movements simply involve lengthening or shortening a single leg, and are independent of anything the skier might do with the body from the pelvis up. The body tilting movement started by the flexing or extending flattens the skis. So these movements do activate the release, and that's why some refer to them as releases.
One can also release with the foot -- ankle-tip the new inside ski towards being flat (or "untip" or "flatten" if one insists)\to release. Or one can go bow-legged with that new inside leg to flatten that ski. One can do stuff with the upper body too. Blend!
Do you remember who wrote the description below?
I thought it was pretty good at the time and still do. Accurate too! I don’t even have to add emphases to important points because the original author already did.
9.Time to hit the jackpot: "over-complete" your turns. Do this by bringing both feet back up under your body so far that your hips and your whole upper body end up, by default, downhill of your feet. It makes sense to call this "Over-Completing" the turns. If you are able to track where your feet are relative to your hips, you'll know when you are doing this... no fair looking; you'll fall on your head.
10. When your feet get above your body (technically, your center of mass) on the hill (even a tiny wee bit), you'll topple onto your new edges without having to do anything else. Your body will have crossed over your skis without you moving it there; the skis will consequently tip onto new edges. Your Sideways-Figure-Eight-Infinity-Move will have initiated your next turn simply because you "over-completed" the last turn. Your feet will have followed one lobe of the Infinity-Move-Sideways-Figure-Eight path. Repeat as you link short radius turns, and you'll feel your feet moving along that Sideways Eight underneath your body quite clearly. A similar version applies to medium and long radius turns, but it's not as dramatic to feel as you are learning it.
11. This is what Bob calls the "do nothing" initiation. You didn't initiate anything, you simply completed the last turn. (I think he used that phrase....)
12. The first time this works, hold onto your socks. You will be surprised at the sensation. That next turn will happen lickity-split fast and unexpectedly, because you didn't make it happen the usual way. Enjoy!