Unity is behaving absolutely as if it has rocket launchers attatched to it. :) It is even quicker that the early alpha-II from quantal.
A marked increase in performance and speed.
ubuntu@ubuntu:~$ uname -a
Linux ubuntu 3.7.0-3-generic #9-Ubuntu SMP Tue Nov 20 22:38:45 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux