Which Distributed Source Control System has the best integration with Windows & Visual Studio?

It seems that both git and mercurial are rather Linux oriented. Which of them is more mature on windows?

Solution

If you're looking for a strong integration with a DVCS inside Visual Studio: alt text

Check the full tutorial here: http://codicesoftware.blogspot.com/2010/03/distributed-development-for-windows.html

Plastic provides you with all the distributed stuff you need and is specifically designed to work on Windows (ok, it does Linux and Mac OS too, but it shines on Windows)