That's the thing. If "my"(and I'm speaking generally as everyone likely thinks the same way) worlds aren't near the top, the rankings will be dismissed. Almost everyone believes their world is a good world. I'm sure tomjames will say "It's just the formula" when people inevitably call him names because their world is 103 but he created the formula. So you have to ask "Did he tweak it to move his worlds up?" because I would.
A handful of worlds are often mentioned as the "top" worlds in the forums. If NABCL, MGraham, Moneyball, Coop and APastime aren't near the top, most will assume the program is flawed. Beyond that, no ratings system can determine if you enjoy your world. And, really, that's the most important thing.