Not sure how scientific this was but I ran a series of tests today.
Conditions were:
80 Degree high humidity Possibly 90% on the edge of rain,
Engine completely warmed up for about 1/2 hour of driving,
Battery Pack (SOC) is 4 bars off of full,
No A/C or any other accessories,
Windows up,
etc

I did tests of 2 terrains:
1. slight incline
2. Up/down a series of very large hills over 2 miles.

The 1st test was on a straight strip of road that has a linear slight incline.
I did a series of "Control" tests to measure the road itself and this is what I found:
The road chosen is 1/2 mile long.
The HCH maintains 50MPH with FCD held at 44MPG.(40 + 1 bar) on ascent.
Other way around on the decent it maintans 50MPH at 84MPG.
Hopefully that will show the grade as it is not level.

I did a series of tests to measure fuel consumed going 0-50 on ASCENT ONLY.
Once 50MPH is reached the FCD is adjusted to 42MPG to maintain speed.
MPG is measured at the 1/2 mile mark. Tests were ran 3 times, each had about the same results.
This is what I measured:

Full throttle: 0-50 in 10 seconds 19MPG
FCD held at 20MPG: 0-50 in 31sec 25MPG
Very slow acceleration: 0-42 in 56 sec (Reached 1/2 mile) 30MPG

Big hill tests both ways up & down:
Since these hills aren't typically from zero acceleration, they begin at 50MPH.
FCD is reset at the base of the bottom of the hill or at the top, depending on the test.
These are large hills and I'm guessing 2K feet over the 2 miles.
Perhaps later I can snap and post a picture of these monsters.
MPG after 2 miles:

CRUISE CONTROL ON:
DECENT: 85MPG
ASCENT: 43MPG

CRUISE CONTROL OFF:
DECENT: Driving with the load: 90MPG
ASCENT: Slowing on ascent, easy gradual acceleration on flats: 59MPG

My conclusion from this is to keep off of Cruise Control, always drive with the load and accelerate as gradually as practically possible.

Comments?

Efficient drivers do it better.
1003 miles a tank personal record. 74MPG calculated. HCH1 CVT