I am going to make a small (and probably useless) experiment myself. I will keep from using Google, and I will use Yahoo! during the week for doing my searches. I like to see if it just works fine for me... or if I find it unsatisfactory... I believe that search engines are quite similar nowadays, and they probably use mostly very similar technology, so it should not make a big difference, it may be just we got used to use Google and we don't feel to try something else. Or maybe I am wrong, and Google excels other options. The only way to know, just giving a try. I am pleased working with Google, will I be satisfied with Yahoo! ?
(... to be continued ...)