Hi @stas, thanks for posting.
These types of delays are often caused by the scripting or files of the site.
Taking a closer look at your site, I see that the server responds in about 1 second, then takes an additional 2-3 seconds to load the content.
You might want to try disabling any plugins or switching to a default theme to see if that alleviates the issue.
You can also test using a static HTML or TXT file, to more closely test server response time.
We are on a Slow Godaddy dedicated business server tier. Why do we keep getting such slow server response times on our wordpress site when we pay extra money for speed? What is causing this?