I thought toe-in resulted in quick turn-in; ie:- when starting a turn the outer wheel takes more load as weight is transferred to that outer wheel and as it has already has some toe-in it is already turning into the corner and so initiates the turn quicker.
Conversely with toe-out, as the outer wheel is loaded when you turn the wheel it first has to get back to straight ahead before it actually turns left, hence a resulting sluggish response.
Any other theories? Regards PJB.