I understand that...

What I am saying is with a smaller diameter it will make less difference.
Yes, you will have the same forces at work, but it will be in smaller amounts due to the smaller component.
So I would say, from a purely scientific standpoint. No... won't be because you will notice less of a change from lightening the driveshaft.

You will notice a quicker acceleration, but deceleration will be a little to non noticeable difference.