Since this is a thread on improving fuel efficiency, that's probably irrelevant. The discussion about vaporizing the fuel too soon relates to hurting Volumetric Efficiency due to the additional room vaporized fuel occupies. This was a major concern when the restrictor plates were first introduced to NASCAR. You have to consider "The Precious Commodity".
In an all-out performance application, the precious commodity is air. If you need more fuel, you can pour liquid fuel into an engine and drown it. Air, though, is limited by what can squeeze through the throttle blades, through the ports, and past the valves on the intake stroke. Thus, air is the precious commodity.
In a fuel economy application, fuel is the precious commodity. If you need more air, simply open the throttle a bit more. Vaporizing as much of the fuel as possible, as soon and quickly as possible improves Combustion Efficiency (perhaps at the expense of Volumetric Efficiency).
