HOW DID THIS HAPPEN? Don't people like winning at video games? Oh well. Pikachu ranked #3, behind Electivire and Ampharos, but ahead of everything else, and by that I mean powerhouses like Heliolisk, Stunfisk and Emolga. However, we can reassure ourselves in that it's quite clear that people used Pikachu because they were bribed to do it, because almost 40% of Pikachu users gave it something else than a Light Ball. Sure, in normal circumstances the only reason to use Pikachu over Raichu is the fact that it has the Light Ball, but if you force yourself to use one it seems like the Light Ball isn't the be-all-end-all option, with the Focus Sash and even the Eviolite (come on now, Pikachu wouldn't survive any kind of hit even with the Eviolite) seeing quite a bit of play.
Looking forward to seeing the Smogon stats for this thing. I'll amend this post once they're up.