I get more space per watt bud weight growing tiny plants than i do growing fewer bigger plants.....a plant that pulls 2oz every 7" of space can rack up maximum bud very quickly!! Sure I am limited by the limited space I have, but i still think small plants have the potential to pull more (considering a square foot versus bud output ratio) than large plants can do.
I know when i did indoor stacked SoG grows, my numbers heavily outweighed larger plants yields.