I am running on a 3.0GHz mac pro here with 16GB of RAM. I felt like my machine was relatively fast, but after switching over and running in XP today via bootcamp, I saw that my overall "getting around" and web browsing was about 5x as fast. Booting apps, moving things, it was snappy and fast with no lag. With OS X 10.5, things just seem to drag along at a much slower pace. I am guessing it is due to the bulk of overhead or running a system with such a heavy GUI and set of code. Any suggestions. It's just not snappy. OS X is slower than Windows on this machine, which was actually designed to run the Mac OS. It is odd, right?