Confusion galore ...!!!!!
"Maximum trigger delay" and "holding your angles" ... just think what that suggests .... restricting the natural flow of kinetic energy from the body through the arms and wrists. That's what it means, scientifically!!!
Now, you can naturally retain a wrist angle with a steep, short iron swing ... but certainly not with your driver and long clubs. Excessive snapping of the wrist is just a conscious act of desperation, and when you go conscious into the depth of your golfswing, you are asking for trouble.
The arm-wrist-clubshaft angle starts to open up about when the shaft is vertical in the downswing. Yes, release begins about half way into your downswing, because your wrists cannot resist the gaining momentum of the golf club ... past vertical. There are tricks you can use to hold the angle, but then you must apply a very vigorous hand couple ... a 'couple' is a set of forces, in this case the the right and left hands/arms twisting around each other to get a left hand supination and a right hand pronation.
All this must happen in milliseconds (thousandths of a second) because the downswing is only about half a second. Much of it must be done unconsciously after proper practice, and to then inject a conscious restraint like 'holding the angle' ... well that's downright wrong. As BrianM says "the uncocking happens too late" .. because you just can't time it ... you're only guessing consciously and breaking the flow of the energy in the kinetic chain.
All this 'scientific' mumbojumbo will just confuse you into creating something unreal in your natural golfswing style. This is the danger of trying to create a homemade golfswing and avoiding judgement and direction by a golf teacher ... like BrianM.