Can Headline Decide Your Traffic?

The question can look like very stupid and having no meaning to it, but had you ever thought of that the catchy headline can make your posts look better. Many great articles go unnoticed on social bookmarking sites because their headline is not catchy enough. Your reader is going to decide to read your articles or not by your Headline and if it is not attractive enough he will not waste his time on article even though it is good article.
Your headline is the first, and perhaps only, impression you make on a reader. With a good headline or post title you can force your reader with read me effect. suppose that 8 out of 10 people will read headline copy, but only 2 out of 10 will read the rest. This is the secret to the power of the headline, and why it so highly determines the effectiveness of the entire piece. The better the headline, the better your odds of beating the averages and getting what you have written would be read by larger percentage of people.
If your percentage of traffic is coming through social networking sites like tweeter, deli.cio.us, stumbleupon etc and your post title is not good enough then how can you get good traffic flow to your blog. People will  directly neglect your article/s causing you your potential readers.
There may a condition occur that your Headline appeals more from your post than that you are providing to the readers. In such cases again its your responsibility to write a good post with a good header.