Ron,
Let me rephrase what you just posted to make sure I understand exactly what you are saying.
With 5 links under tension and everything remaining the same (rear overhang etc.) you will get the SAME weight transfer to the front axles of the tow vehicle regardless of whether the receiver bends upwards or not when the WD force is applied.
Is this an accurate statement of what you are saying in your post above? If so, then it is contrary to what I have thought all along and I have learned something new today.
Barney