Ask HN: New User Conversion Rate

I would like to set realistic expectations for our startup's new user sign-ups and am looking for industry averages. What percentage of total visitors to your site end up creating an account?

Our info: - 3% of total visitors that hit our site create an account (free sign up) - 8% of visitors coming from a targeted referrer (like an article about us) create an account - 0.8% of our users end up paying for something - Our target demographic : developers

*Disclaimer - I know this is a complicated issue with lots of factors–still, I would love to hear where your percentages are at.