Given that "conservation" in this case is driven by the rate of usage, minus the rate of recovery - the recharge - from the regen brakes, is it really materially different?
Perhaps, but there's a pretty huge difference between "burn and coast" and "burn and brake". Plus that's for ICE vehicles, not all-electric. ICE uses gas to keep idling even when your foot is off the gas, so that strategy might work, but electric doesn't "idle".