i hope you are not complaining. i get almost 80% traffic from google. as for me as a user, i hate yahoo and live as a search engine
yup, no one uses yahoo. I rank #1 for decent keywords in yahoo but I get no visits at all..in google i'm in a pit for the same keywords so lose lose situation for one of my sites unfortunately. I was actually surprised with the differences between both engines..I thought at least 30% of the population still use yahoo...seems like it's 5%, 95% google!
Most people in the West use Google. If you go to the Far East, you'd see Yahoo having a higher share.
That is the reason why the big G is the supreme of the three. Most of the internet user search through the big G. But of course, it depends on where you rank and what keywords you rank.