Before reading this, do understand that I have nothing against Mr. Kstar. This is because, I understand absolutely nothing that he writes about. The whole neutral, impingement, external, internal rotation, torque thing just spins my head into space.
The solution to that problem? Ask my 2 lab coat friends to translate it for me. After they translate it, 3 people have their heads spinning into space. Then we drink cider and smoke cigars and ask ourselves;
"How many patties can Spongebob Squarepants eat?"
Jokes aside, there's 2 reasons why I do not teach people to squat with the knees pushed out.
1. I tore my own hip labrum and knee meniscus, doing knee-out squats. I've also seen people suffering from knee pain because they're so unstable with their knees pushed out.
I can actually give you the contacts, to these individuals to ask them personally.
2. Personally, I've seen far better squat numbers AND control, with the "Knee go forward-in-out" technique for squats that I teach.
My experience has very negative with knees out squats thus I have a certain fear to it. Unless it's necessary (knees knocking like a bell, ankles of a basketball player), I always teach knees out first.
It's a preference thing.
Still take a read. This one's actually pretty easy to understand.