No, I would not say there is a major performance difference. There is just less stuff running, so there is less RAM usage.
However, as time passes and I keep adding more features to my DE, it is becoming more and more like a packaged DE. For example, in just the past two days, I have added ntpd, ufw, sensors, and alsa to my startup deamons. (Remember, I am talking about my Arch installation, not Sabayon). It is interesting to run a minimal desktop, but in the end, you have to get things done.
Tim
