I only use Google too. I'm open to using any tool that would give me what I need, and if I started being dissatisfied with Google's results I would use another search engine. It's just not happened yet.
Google is the best, i hate using some of the other search engines, although yahoo has improved a little, i think that yahoo and msn are doing quite a lot of work to try to catch up.
Just the reverse for me. Dogpile is my first choice, then Google if I want a bazillion hits outside of the relevant ones I was looking for.
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