new Led Zeppelin album due out late 2012

Here's a pre-released single from the album

Apparently they have been working on this in secret for 4 years and there is some controversy over the release and its productioin. A few different stories circulating around already.
If that's a legitimate sample, I'm looking forward to its release. I like it and don't need them to to release copies of their earlier stuff. I am pretty sure that is Robert Plant's voice - sounds like him in his contemporary releases (eg Raising Sands).
It does sound like Plant and Jimmy Page's style, but It could be the track was bootlegged and someone put their own video to it.