I did some searching on Google about the desktop being slow to load without much luck. One thing I found was a recommendation to install BootChart from the repos which creates a .png file of what is loading and how long it takes. I looked at it but I have no idea what it all means and what to look for. Perhaps you will have better luck.
Friend, thanks so much for helping to research this. I have also been looking into it and although I do not have a smoking gun, a couple of leads did surface. Take a look at the following links and see what you think: