This is a funny poll because most people haven't ridden a Rohloff chain. It's like asking what the best car is and then including a Bugatti in the list of choices, they may make a great car but who here has ever driven one?
I have used a Rohloff chain and they are great chains, strong as hell, but not used that much by mountain bikers. They have a bigger following by trials riders, those guys are hard on chains with all of their pedal kicking so they really notice the difference in strength.