pls use specific keyword for yahoo .... same problem accours against me and i have done like this .....
Don't depend on yahoo for your traffic.Try to Optimize your web site according to google algorithm.Yahoo won't have much market.i read some where they have only 22% market and 70% google 8% bing,altavista and other search.
Google is better than Yahoo, why would they use it, besides there giving their search to Bing(microsoft)
Well yes man Yahoo even for me gives less visitors its just a trend that Yahoo is not used by anyone so you dont get enough visitors from Yahoo .
yahoo is a great search engine but it requires you to pay money , but google is for free so when ranked its cheaper , and it still has the same features as yahoo , also its search engine page loads much faster than google , which makes google top , yahoo isn't bad its just better to go with google