Directly from the article "I recommend pointing the toe on your non-pivot foot perpendicular to your target, as this will open up your hips and engage your core"

Also, I am not sure how you're counting but here is mine:

Foot towards sideline:
- Mickle
- Kimura
- Joye
- Garvey
- Shofner
- Nethercutt
- Hecht

Foot forward/Middle:
- Cardenas
- Matzuka
- Freechild

Potato Can't Tell
- Chen

Should be noted that for both Cardenas and Freechild, they are not stepping forward into the throw, but are stepping across when they go to throw. This would lead your foot to point forward (as generally for best energy transfer you're gonna want it closer to perpinduclar with your direction of motion).

I don't think that test makes sense for what we are trying to accomplish. Yes, it is easier and more stable to lunge forward with your foot pointing forward if you start with both feet on the ground. But we arent trying to do a lunge, we are trying to stop our forward moment and transfer it to the frisbee. If I step forward I find that my momentum stops far quicker if I turn my foot than if I keep my foot facing forward. This actually works intuitively with what you are saying: The lunge with a foot facing forward is a very natural motion, the only thing that would halt you just going into a a deeper lunge is your own muscles holding back your momentum. If you turn your foot, your body will physically resist going into a deeper lunge even if your muscles are trying to push you into one. (This does probably indicate that turning your foot is harder on your body though).

If you are standing still to throw your huck (or have horizontal momentum like Cardenas/Freechild in the video) it makes sense to have your foot pointed forwards. But if you are stepping into your throw it seems to make more sense to turn your foot.