Hugh's whole point to enesexdreamer is that there is no way changing from 10w30 to 5w30 will give you noticeably increased/more responsive throttle response. C'mon, increased throttle response, that you can distinctly feel the difference? That's like saying you can feel the handling difference driving around town after putting on an NSX-R hood.
Unless you are in VERY cold climates, there is no way anyone can actually tell the difference between 5w30 and 10w30 from driving the car.