On my commute home at 2:00-3:00AM I have about 5 areas of 1-2 mile stretches where I put the car out of Drive and into Neutral.
These are all downhill grades and it definetly consumes less fuel to do so, as in evidence by the more rapid movement of the average MPG gauge.

In both instances of coasting on the edge of Regen and in the case of coasting out of gear the instant MPG meter is pegged and therefore useless as a measure.
Because of that, in that instance we must look to the average meter.

Vtech or no Vtech the average meter clicks more rapid while out of gear.
I don't always use the technique, but only when I need to "catch up" on a particularly bad day.

I belive that if I had a manual transmission I'd opt to reboot and simply roll instead, but it's hard on the CVT if you restart going over 35-40MPH.
But that's just me...keep in mind that my commute is in the wee hours of the morning and almost zero traffic.

In my busy afternoon commute to work I don't reboot or coast out of gear unless I'm sitting in a 0-20MPH traffic jam. In that case I refuse to watch my numbers plummet so I'll do what I can.....reboot, coast or whatever it takes.

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