Can the Unconscious Outperform the Conscious Mind?

I found this reading very interesting for a few different reasons. In the reading it is said that more complex decisions can be made more accuratly when they are made quickly. I would also like to compare that with blurps, or quick responses that you say you might not mean, but do you? Some of the tests in the reading have disproved the thoery, but I have a few opinions of my own. First of all when I have taken any multiple choice test, I have found that when I was not certain about the question, my first attempt to answer the question was often times the right answer, but after thinking about it for a while longer I change my answer. Then the following day I get my test back with the right answer erased and the incorrect one circled. This often makes my wonder if I should always just go with my first attempt or to really look at the question with great thought when this instance comes up again. Another comment is that when you say something as a blurp or slur, most of the time what words slipped out of your mouth are very true. How does the brain make such opinions so quickly, yet so accuratly? Like it says in the article we seem to make remarkably good decisions without consciously thinking.