No. Vertical is more effecient plant per square foot, not yield per sq/ft. After you fit twice as many plants in your space than traditional growers, you'll still have all the same obsticles in your way as everyone else in achieving high gram per watt ratio. (Not watt per gram, that's like gallons per mile)
The most effecient method to maximize yield is probably some kind of aeroponics system. You could still stadium grow it, that will help you get more plants in there, but you still need to "power" them.
So is vertical the most efficient system to achieve the highest gram per watt ratio?
It seems like the downfall to vertical is that you would need to veg longer
It seems like the downfall to vertical is that you would need to veg longer and thus would lose (x) amount of weeks over the course of a year. hmmmmm......