In the past weeks for some of the advertising campaigns we manage for US/Canada we saw that yahoo brings more ROI than google.
The number of searches are clear in favour of Google. But the competition is so high on google that for some keywords you better have hyper conversion rates. While yahoo has much fewer serches, but they deliver excellent results.
Even after paying 2x more money for click on google we still get better results from yahoo.
So, I must say I love yahoo. 🙂
PS. Microsoft really sucks!