As you can see from the variety of OpenGL games that were run full-screen as benchmarks in the stock Ubuntu environment when comparing the Unity/Compiz packages, the latest state of the default Ubuntu desktop as of yesterday is only staying the same or getting lower but no performance improvements were witnessed from the common Intel Ivy Bridge setup.
Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.