Last year the magic number was 24 for ladies, men's and and pairs, and 26 for dance (there are not many upsets in dance, so the top couples always win and that's that.)
The year before it was a little more fluid. Ladies and Dance were 24, but Kevin Van Der Perren made the finals with 22 and Kawaguchi & Smirnov also made the finals with 22.
I have a feeling there will be a few upsets this year that will throw some of our pre-season calculations off.