Can chrome incognito mode access regular chrome cookies etc

I can confirm that Incognito Mode does not have access to cookies, auto-fill form data, or WebSQL databases from normal mode. (At least, it does not carry over my GMail session, nor does it auto-fill my email or password into the login form).

As a web developer, Incognito mode is a great way to get an empty browser which provides a clean slate for testing a web page.

However, when running a few Chromium incognito windows, all of them have access to all cookies, and it is not possible to clear browsing data. So starting another incognito window is not really helpful, it is not "clean". A bit confusing at first.