When I shutdown my computer there is some annoying delay, it takes about 5-10 seconds in 13.10 when in the previous version it was almost instantaneous.
During shutdown I press escape to cancel the splash screen and can see that a big part of the delay is after "Asking all remaining process to terminate...", and then there is "Killing all remaining processes". I have filmed the process with my video camera to check which processes had to be killed, but they didn't chat anything to the terminal.
I previously had this same issue in 11.10, and I resolved it as answered here, however this did not work for me in 13.10.
How to identify the cause of delays in the shutdown process, and fix them?