Support thread size isn't a particularly good indicator of much. Maybe just who has the most emphatic fans on the site, lol. You've got to factor in that the earlier the character is seen to be out of the running, the more that is going to stunt their thread's activity. Secondly, some threads are carried by a few super active posters rather than more generalized activity. This, for ...some... reason, is often the case for cute and female characters. God forbid being a cute female character. I mean last time Lip's thread was in the top 10. Lip.
And lastly, thread size just... isn't a reliable indicator for overall popularity. I mean, looking at that top 10, Sora isn't present, but he would trounce several of those characters in a poll. Last time, the threads for Palutena and Little Mac weren't nearly as active as you'd expect for characters as popular as they were at the time, but actual popularity polls still reflected the affinity people had for those choices.
Thank you, I learned something today.