I think they proved that talking to a plant, regardless of tone of voice, whether it be yelling at the plants or speaking nicely to them, encouraged growth.
My plants love to listen to guns n' roses. Particularity November Rain, right before they go to sleep. They even sway to the song and hold lighters up in the air from time to time No joke
Before putting a plant into 12/12 I do an ancient Seneca Indian dance around the plant. It keeps the bugs away and is a good cardio to boot.
Seriously.....About the only thing I do that may be construed as somewhat original is I bottom feed my plants from beginning to end (in soil). I figure it's good for hydro, it's good for soil. So far no root rot or any other problems.