No, the Sith isn't more powerful than the Jedi. However, the short answer is that it's complicated. Good article though!
Discussion
When you stare into the abyss...
True dat, but I wouldn't recommend staring into the abyss while crossing the footbridge. Only before (for motivation) and after (for research purposes, allegedly).
Sith is the left pillar and Jedi is the right one. Top right flows into top left energy wise, although they're at the same level in order to preserve the balance of the force. Hence the disturbance sometimes occurs so balance must be restored.