I have tried dozens of search engines. At school we did some research on search engine development and successfully build one. I don't know and I think most of the people are unaware about this. The information retrieval algorithm used by google are far superior than most of the other search engines. Not only it gives results in blink of an eye, the accuracy is awesome. Google results are generally highly relevant as compared to other major search engines like Yahoo and Bing. In addition, Google Adwords, Google Analytics and adsense are incomparable. Google rocks.
its the giant. and its simply rocking the search engine industry. so i think its the best and i always this search engine.
I am amazed to see some threads in which soemone commented that ASK is doing a lot to get better than Google. I mean; come on. Isn't it like comparing camels with goats. Google is superior not because its popular but becasuse it gives the fastest and most relevant results. Compare with anyone else. Make a site with good original contents and try to compare which search engine gets you indexed first. I think Google will continue dominating others for quite a while.