Rated 5 out of 5 stars
Does indeed disconnect sites from contacting Google when inappropriate (forbidding cookies for third-party didn't concern Google as third-party up to now, and that's only for the cookie!).
A slight issue with youtube : opening a link in a new tab leads to a page with the correct url but empty, opening in same tab is ok) - Otherwise seems to handle things just fine.
This bug will be fixed in the next version (https://github.com/disconnectme/fbdc/issues/7 — refers to Facebook but also applies to Google, including YouTube).