Does ranking guarantee sales or success?

After being in the top 3 on Google for 'wilmington nc web design' for almost a year now, I had to ask myself this question. Google ranking is so highly stressed, but conversions is another issue. What happens if/when they get to your site? Do they leave after seeing the home page because they don't know where to go next? Are they making it to your contact page and then leaving? 

In my case, the ranking has definitely helped, but according to my stats, I have people coming to my site everyday, but that does not mean I am getting calls or emails everyday. What's the reason? I'll let you know when/if I find out - if you have any suggestions or comments please feel free to leave a comment here.