Phoronix: Will Nouveau Driver Impact Ubuntu 12.04's Battery?

Ubuntu 12.04 LTS is shipping with the Nouveau driver by default as the open-source (reverse-engineered) NVIDIA graphics driver support, just as they have done in previous releases, but will this cause your mobile device to go through increased power use?..

http://www.phoronix.com/vr.php?view=MTA4MDU