If you submit to Yahoo it can also turn around and bite you. Because of my submission several years ago the website is stuck in yahoo with the following title and descripotion that the geniuses at the directory gave me:
CasinoRanking.com
ranks online casinos.
While yahoo may use google search results it uses your directory description in the search results. Because of this awful description and title I get far less traffic than i should.
And no one ever used the yahoo directory itself. I will never give those idiots another dime.
Antoine