"I have not noticed any kind on delayed response in/out of gear at all."

Maybe mine shouldn't do it then? Just so you understand, my throttle response never hesitates coming out of park and driving it normally. I have to be driving and then go from neutral then back to drive again..that is when it the throttle hesitates for a couple seconds.

Can you try driving your 4runner then come to a complete stop, place it in neutral and then put it in drive and see if you can accelerate right away with good throttle response? These new vehicles monitor so much stuff there might be unusual scenarios that cause these problems to show up?