The moon duplicates? Weird... but yeah the intro will not run good on slower computers and/or video cards. I recommend at least a 1GHz cpu and a +64mb Geforce 2 or faster card. It has to do with the fact that there are 9 huge models of planets moving in space and the nebula cloud is I think 12 gigantic billboards in a row to give it depth. With the words scrolling too, a slower video card just cant handle it. I tried to put in a few checks for slower cards so that they will get a chance to catch up during the intro if they are running behind, but I plan to do a major rewrite of it when I get some more time.
And yes, I have spent a LOT of time on it, I seem to have lost my only other 2 programmers, and there is still a long ways to go.